Q. Which machine tool is known as the mother machine tool?
A. drill
B. milling
C. lathe
D. none of mentioned
.
Answer: C
Explanation: Lathe is known as the mother machine tool because it
can perform various type of operations. It is a versatile machine.
Q. Lathe is primarily used for producing ____surfaces.
A. flat
B. curve
C. taper
D. none of the mentioned
.
Answer: D
Explanation: Lathe is primarily used for producing cylindrical surfaces. But today it can perform various operations and perform various surfaces like curvilinear surface, flat surface and so on.
Q. Which type of surface is produced by turning operation in lathe machine?
A. flat
B. cylindrical
C. taper
D. none of the mentioned
.
Answer: B
Explanation: Cylindrical surface is produced by turning operation in lathe machine. This turning can be done on the external surface. Boring is a type of turning which is performed in the internal surface.
Q. What is the necessary condition for turning?
A. material of work piece should be harder than the cutting tool
B. cutting tool should be harder than the material of work piece
C. hardness of the cutting tool and material of of piece should be same
D. none of the mentioned
.
Answer: B
Explanation: Cutting tool should be harder than the material of work piece, so that it can be able to cut the work piece into the desire shape.
Q. Traversing of tool parallel to the axis of job is termed as_____
A. cross feed
B. longitudinal feed
C. both cross feed and traversing feed
D. none of the mentioned
.
Answer: B
Explanation: It is the definition of longitudinal feed. Similarly, traversing of tool perpendicular to the axis of job is known as cross feed.
Q. The swing diameter over the bed is the largest diameter.
A. true
B. false
.
Answer: A
Explanation: This is true. Swing diameter over the lathe is the largest diameter of work over the bed that will revolve without touching height of the centres measured from the bed of the lathe.
Q. Lathe cannot produce internal features like holes.
A. true
B. false
.
Answer: B
Explanation: This is false. Lathe is a versatile machine tool. It can produce holes, flat surfaces and so on.
Q. Which type of feed is needed in facing operation?
A. longitudinal
B. cross
C. both cross and longitudinal
D. none of the mentioned
.
Answer: B
Explanation: Facing operation is done by the cross feed. In facing, workpiece is rotated against the single point cutting tool.
Q. Which type of surface is produced in facing operation?
A. cylindrical
B. taper
C. flat
D. none of the mentioned
.
Answer: C
Explanation: Flat surface is produced in facing operation as per the definition. In facing operation, metal is removed by the tool from thee end of the metal and flat surface is produced.
Q. Traversing of tool at any angle to the job axis produces curve surfaces.
A. true
B. false
.
Answer: B
Explanation: This is false. Traversing of tool at any angle to the job axis produces taper surfaces.
Q. In taper operation, which type of surface is produced?
A. flat
B. curve
C. circular
D. none of the mentioned
.
Answer: D
Explanation: Taper type surface is produced in the process of taper turning. Taper is a shape in which the diameter of the both ends of bar are different.
Q. Which type of feed is needed in turning operation?
A. longitudinal
B. cross
C. both cross and longitudinal
D. none of the mentioned
.
Answer: A
Explanation: As per definition, longitudinal feed is needed in turning operation. Longitudinal feed is always parallel to the axis of rotation of the spindle.
Q. Which type of surface can be produced by lathe?
A. flat
B. cylindrical
C. curvilinear
D. all of the mentioned
.
Answer: D
Explanation: Lathe is a versatile machine. It can perform various types of jobs. It is primarily intended for producing only cylindrical surface but it can produce various types of surfaces.
Q. Which type of lathe is also known as centre lathe?
A. engine lathe
B. bench lathe
C. room lathe
D. capstan lathe
.
Answer: A
Explanation: Engine lathe is also known as the centre lathe. This centre lathe is generally used for the production of cylindrical surfaces.
Q. Wheel lathe is the type of ____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: D
Explanation: Wheel lathe is the type of special purpose lathe. This lathe is generally used for the purpose of turning wheels of railways locomotives and so on.
Q. Wood working lathe is the type of ____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: C
Explanation: Wood lathe is the type of speed lathe. Speed lathe can revolve spindle with great speed. It is also used for turning small objects.
Q. Geared lathe is the type of____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: A
Explanation: Geared lathe is the type of engine lathe. Engine lathe is a screw cutting type lathe. It has back-geared cone-driven headstock.
Q. Belt driven lathe is the type of____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: B
Explanation: Belt driven lathe is the type of centre lathe. In practical, various types of belt driven machines are used like V belt driven machine and so on.
Q. Duplicating lathe is the type of____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: D
Explanation: As per the classification of lathe, duplicating lathe the type of special purpose lathe. It is rarely used.
Q. Spinning lathe is the type of____
A. engine lathe
B. centre lathe
C. speed lathe
D. special purpose lathe
.
Answer: C
Explanation: Spinning lathe is the type of speed lathe. Spinning lathe is a lathe generally used the purpose of shaping metal holloware with the help of flat stock over a form (of revolving type) with the help of hand tool.
Q. Which of the following is the type of engine lathe?
A. centering lathe
B. individual motor driven lathe
C. duplicating lathe
D. all of the mentioned
.
Answer: B
Explanation: Centering lathe is the example of speed lathe and duplicating lathe is the type of special purpose lathe while individual motor driven lathe is an example of engine lathe.
Q. Which of the following is special purpose lathe?
A. polishing lathe
B. centering lathe
C. spinning lathe
D. none of the mentioned
.
Answer: D
Explanation: Polishing lathe, centering lathe and spinning lathe are the examples of speed lathe.
Q. Which of the following is the example of speed lathe?
A. wheel lathe
B. polishing lathe
C. gap bed lathe
D. all of the mentioned
.
Answer: B
Explanation: Wheel lathe and gap bed lathe are the examples of the special purpose lathe while polishing lathe is an example of speed lathe.
Q. T – lathe is the example of bench lathe.
A. true
B. false
.
Answer: B
Explanation: This is false. T – lathe is the example of special purpose lathe.
Q. Which of the following is the type of lathe?
A. bench lathe
B. tool room lathe
C. capstan and turret lathe
D. all of the mentioned
.
Answer: D
Explanation: These all are the types of lathe as per the lathe classification. Lathe is primarily intended for the purpose of producing cylindrical surfaces although today it becomes a versatile tool.
Q. Lathe can be classified on the basis of_____
A. designs and construction
B. fundamental principle
C. function performance
D. all of the mentioned
.
Answer: A
Explanation: All types of lathe machine employ the same fundamental principle of operation and perform the same function. They are differ only in the terms of their designs and constructions.
Q. Wood working lathe is the example of capstan and turret lathe.
A. true
B. false
.
Answer: B
Explanation: This is false. Wood working lathe is the example of speed lathe.
Q. Which of the following is the base of the lathe machine?
A. bed
B. tailstock
C. headstock
D. none of the mentioned
.
Answer: A
Explanation: Bed is the base of the lathe machine. This provides the necessary working height for the lathe.
Q. Which of the following is fitted on the bed?
A. headstock
B. tailstock
C. headstock and tailstock both
D. none of the mentioned
.
Answer: C
Explanation: These both are fitted on the bed as per the definition. This is the structure on which the entire lathe parts are situated.
Q. The bed generally rest on copper structure.
A. true
B. false
.
Answer: B
Explanation: This is false. Actually, the bed generally rest on cast iron or welded structure.
Q. Which of the following is not the part of the bed?
A. vee slide
B. tailstock
C. carriage
D. none of the mentioned
.
Answer: D
Explanation: All are the part of the bed. Tailstock is a sliding unit on the bed-ways of the lathe bed. Carriage is the part of the lathe which slides over the bed-ways.
Q. Which of the following provides foundation for the whole machine?
A. tailstock
B. bed
C. headstock
D. carriage
.
Answer: B
Explanation: As per the definition of the bed. It is the base of lathe which provides needed height as well as foundation for whole machine.
Q. Small lathes have a sliding bed.
A. true
B. false
.
Answer: B
Explanation: This is false. Generally, small lathes don’t need a sliding bed. Very large lathes have a sliding bed.
Q. There are some beds, which hold a gap closer to the headstock.
A. true
B. false
.
Answer: A
Explanation: It can be easily seen from the definition of the bed. The headstock is a fixed unit of the lathe on the left hand side of the lathe bed.
Q. Which type of bed design offers more rigidity and thermal stability?
A. true slant bed
B. flatbed
C. conventional bed
D. none of the mentioned
.
Answer: A
Explanation: True slant bed provides more rigidity and thermal stability as compare to others. It is very necessary for chips to fall to the chip plan. Slant bed do this job better than flat bed and conventional bed.
Q. In which slant angles, the slant bed design is offered?
A. 30 and 60
B. 60 & 45
C. 30, 60 and 45
D. 30 and 45
.
Answer: C
Explanation: Mainly this bed design is offered in 30 and 45 slant angles, but sometimes slant bed of 60 degree type is also offered.
Q. In which type of bed, length of guide rail is bounded to the
deepness of the casting?
A. true slant bed
B. flat bed
C. conventional bed
D. none of the mentioned
.
Answer: B
Explanation: It can be easily seen from the definition of the flat bed. The guide way is the surface of the bed in contact with the sliding units of lathe.
Q. There are some beds, which hold a gap closer to the headstock.
A. true
B. false
.
Answer: A
Explanation: The gap is there so that it can permit bigger diameters to be tuned.
Q. Which of the following is the part of bed?
A. vee slide
B. machine ways
C. headstock
D. all of the mentioned
.
Answer: D
Explanation: All are the parts of the bed. This bed and its parts generally assigned iron casting.
Q. In which type of bed, a heavy machine along with a smaller
footprint achieved?
A. true slant bed
B. flat bed
C. conventional bed
D. all of the mentioned
.
Answer: A
Explanation: This is the advantage of true slant bed. It take up less space, everything is rotated about the centerline which is slightly away from the operator which is capable of putting the spindle closer to get parts in and out.
Q. Which of the following are the advantages of cone pulley drive?
A. easy to maintain
B. can take up heavy load
C. positive drive when the back gear is in engagement.
D. all of the mentioned
.
Answer: D
Explanation: These all are the advantages of the cone pulley drive. It is stepped pulley mounted on the main spindle which is free to revolve.
Q. Number of spindle speeds is limited to the number of steps
in the cone pulley drive.
A. true
B. false
.
Answer: A
Explanation: It can be easily seen from the definition of cone pulley drive. This cone pulley gets the drive from the main motor.
Q. What does happen during the overload in the cone?
A. number of steps in cone pulley increases
B. belt slips off
C. nothing happens
D. none of the mentioned
.
Answer: B
Explanation: During the overload in the cone, the belt slips off so that no major damage happens to the lathe.
Q. It doesn’t take time to change spindle speeds.
A. true
B. false
.
Answer: B
Explanation: This is false. In practical work, it takes time to change the spindle speed.
Q. Cone pulley drive without back gear arrangement means_____
A. back gear in
B. back gear out
C. back gear neutral
D. none of the mentioned
.
Answer: B
Explanation: It can be easily seen from the definition of the back gear. The headstock having cone pulley drive is known as cone pulley headstock.
Q. Cone pulley drive with back gear arrangement means_____
A. back gear in
B. back gear out
C. back gear neutral
D. none of the mentioned
.
Answer: A
Explanation: It can be easily seen from the definition of the back gear. The axis of this back gear shaft is parallel to the axis of the main spindle.
Q. Which of the following mounted on the bush bearing?
A. speed motor
B. spindle
C. both spindle and speed motor
D. none of the mentioned
.
Answer: B
Explanation: As per the construction of lathe, spindle is fitted on the bush bearing. It is mounted in the headstock casting and a gear wheel called bull gear is keyed to it.
Q. Stepped pulley mounted on the main spindle is fixed.
A. true
B. false
.
Answer: B
Explanation: This is false. Stepped pulley is free to revolve.
Q. The back gear unit has a shaft, which carries _____
A. a gear
B. a pinion
C. a gear and a pinion both
D. none of the mentioned
.
Answer: C
Explanation: The back gear unit has a shaft, which carries a gear and a pinion. The number of teeth of the gear and a pinion on the back gear shaft corresponds to the number of teeth on the bull gear and the pinion on the cone pulley.
Q. The axis of the back gear is_____ to the axis of the main spindle.
A. parallel
B. perpendicular
C. at any angle other than 0 and 90
D. none of the mentioned
.
Answer: A
Explanation: The axis of the back gear is parallel to the axis of the main spindle and the back gear is bought in engagement or disengagement with the cone pulley system by means of a lever.
Q. A three-stepped cone pulley headstock provides three direct ranges of speeds.
A. true
B. false
.
Answer: A
Explanation: This is true. A three-stepped cone pulley headstock provides three direct ranges of speeds through the belt connection and with the back gear in engagement, three further ranges of reused speeds can be obtained.
Q. It is a box section having a top cover. For which of the
following part of lathe, above sentence is true?
A. cone pulley drive
B. all gear drive
C. carriage
D. none of the mentioned
.
Answer: B
Explanation: The mentioned sentence is true for all gear drive as per the definition of it. The headstock having all gear drive is known as all-geared headstock.
Q. The top cover of all gear drive is_____
A. removable
B. non-removable
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: The top cover of all gear drive is removable if needed. All gear drive is like a box section of lathe.
Q. All gear drive is equipped with_____
A. clutches
B. a brake
C. clutches and a brake both
D. none of the mentioned
.
Answer: C
Explanation: All gear drive is equipped with these both clutches and a bark. Clutch is a device which is used to connect and disconnect an engine and power transmission.
Q. All gear drive has external webs.
A. true
B. false
.
Answer: B
Explanation: This is false. All gear drive has internal webs for shaft bearing and some other purposes.
Q. Output shaft is connected by means of V belts to the main motor.
A. true
B. false
.
Answer: B
Explanation: This is false. Actually, input shaft is connected by means of V belts to the main motor.
Q. Sliding gears may be mounted on_____ intermediate shafts.
A. only one
B. only two
C. two or more than two
D. none of the mentioned
.
Answer: C
Explanation: There may be two or more intermediate shafts on which sliding gears are mounted. It has an input shaft which is connected by means of V belts to the main motor.
Q.The main spindle is the first driven shaft in the headstock assembly.
A. true
B. false
.
Answer: B
Explanation: This is false. The main spindle is the last driven shaft in the headstock assembly.
Q. Which of the following operates the forks of the sliding gears?
A. lever
B. spindle
C. clutch
D. none of the mentioned
.
Answer: A
Explanation: The lever operates the forks of the sliding gears. This levers are situated outside in the front of the headstock assembly.
Q. The nose of the spindle is outside the headstock casting.
A. true
B. false
.
Answer: A
Explanation: This is true. These nose is designed to accommodate the work holding devices.
Q. What is the purpose of having webs in all gear drive?
A. for stiffening
B. for taking shaft bearings
C. for stiffening and taking shaft bearing both
D. none of the mentioned
.
Answer: C
Explanation: The webs are used for these both purposes:for taking shaft bearings and for stiffening. This gear drive also has shaft equipped with clutches and a brake.
Q. Which of the following is not true regarding the all gear drive?
A. the headstock having all gear drive is known as all geared headstock
B. the nose of the spindle is designed to accommodate the work holding devices
C. the nose of the spindle is inside the headstock casting
D. tone of the mentioned
.
Answer: C
Explanation: All the mentioned sentences are true except the one which says that the nose of the spindle is inside the headstock casting. Actually, the nose of the spindle is outside the headstock casting.
Q. Which of the following is not true regarding tailstock?
A. tailstock is also known as loose headstock
B. it is a fixed unit on the bed ways
C. it provides support to the other end of the work when it is being machined
D. none of the mentioned
.
Answer: B
Explanation: The all above mentioned statements are correct except one which says that it is a fixed unit on the bed ways. Actually, it is a sliding unit on the bed ways
Q. For performing which kind of operations, it ( tailstock ) holds a tool?
A. drilling
B. reaming
C. tapping
D. all of the mentioned
.
Answer: D
Explanation: Tail stock holds a tool for performing operations such as drilling, reaming, tapping etc. To accommodate different lengths of work, the body of the tailstock can be adjusted along the ways chiefly by sliding it to the desired position.
Q. The body of the tailstock can be adjusted by clamping with the help of_____
A. bolts
B. plates
C. bolts and plates both
D. none of the mentioned
.
Answer: C
Explanation: The body of the tailstock can be adjusted by clamping with the help of bolts and plates to adjust with job’s dimensions. The body of tailstock is situated on the right hand side of the lathe bed.
Q. The upper casting of the body can be moved_____ from the operator.
A. toward
B. away
C. toward or away both
D. none of the mentioned
.
Answer: C
Explanation: The upper casting of the body can be moved toward or away from the operator. This movement is done with the help of setover screw to offset the tailstock for taper turning and to realign the tailstock centers for straight turning.
Q. Which of the following is not the part of spindle?
A. dead center
B. hand wheel
C. setover screw
D. none of the mentioned
.
Answer: D
Explanation: All above mentioned are the parts of spindle. In tailstock, the spindle holds dead center. In headstock, the spindle is able to hold live center.
Q. Offset of tailstock is done for_____
A. taper turning
B. straight turning
C. both turning of taper type and straight type
D. none of the mentioned
.
Answer: A
Explanation: Offset is done for the purpose of taper turning. Taper is a shape in which the diameter of the both ends are different.
Q. Realign of tailstock center is done for_____
A. taper turning
B. straight turning
C. taper turning and straight turning
D. none of the mentioned
.
Answer: B
Explanation: Realign is done for the purpose of straight turning. The body is bored to act as the barrel which carries the tailstock spindle that moves in and out of the barrel by means of a screw when the tailstock hand wheel is turned.
Q. Which type of rotation of the hand wheel causes the spindle
to be drawn inward?
A. clockwise
B. anticlockwise
C. either anticlockwise or clockwise
D. none of the mentioned
.
Answer: B
Explanation: Anticlockwise rotation of the hand wheel causes the spindle to be drawn inward. This spindle has a keyway in the underside which mates with a small key fitted on the barrel to prevent rotation.
Q. The front of the spindle has a taper hole.
A. true
B. false
.
Answer: A
Explanation: The front of the spindle has a taper hole into which the dead centre or other tools fit.
Q. Anticlockwise rotation of the hand wheel causes the spindle to advance.
A. true
B. false
.
Answer: B
Explanation: This is false. Clockwise rotation of the hand wheel causes the spindle to advance. Due to this clockwise and anticlockwise movement, the end of the screw strikes the back of the dead center or any tool that is fitted into the hole.
Q. Headstock is a flexible unit.
A. true
B. false
.
Answer: B
Explanation: This is false. Headstock is a fixed unit. It provides mechanical means of rotating the work at multiple speeds.
Q. Which of the following is supported by the headstock?
A. spindle
B. spindle bearing
C. speed change mechanism
D. all of the mentioned
.
Answer: D
Explanation: These all are supported by the headstock.
Q. The spindle is solid.
A. true
B. false
.
Answer: B
Explanation: This is false. It is not solid. The spindle is hollow in headstock and it is supported by the headstock.
Q. Spindle holds dead centers.
A. true
B. false
.
Answer: B
Explanation: This is false. Spindle holds live centers.
Q. Which of the following method is used to vary the speed of a lathe spindle?
A. gear out
B. gear in
C. both gear out and gear in
D. none of the mentioned
.
Answer: C
Explanation: These both methods are used to vary the speed of the lathe. Apart from these two, variable speed motor is also used to vary the speed of a lathe spindle.
Q. Which type of end does tapered bar has?
A. pointed
B. projected
C. pointed or projected
D. none of the mentioned
.
Answer: C
Explanation: Taper bar may has pointed or projected end depending upon the task. Tapered bar is a bar which has different diameters at both ends.
Q. Headstock usually stands on the left side of the lathe.
A. true
B. false
.
Answer: A
Explanation: Headstock usually stands on the left side of the lathe, while tailstock stands right side of the lathe.
Q. Which of the following lathe part serves as a housing for the
back gear, driving pulley etc?
A. tailstock
B. headstock
C. bed
D. none of the mentioned
.
Answer: B
Explanation: Headstock performs this job. This headstock should be robust as so many cutting forces are involved in it.
Q. Spindle is fitted with_____
A. chucks
B. faceplates
C. chucks or faceplates
D. none of the mentioned
.
Answer: C
Explanation: Spindle is fitted with chucks ( 3 jaw, 4 jaw etc. ) and faceplates. A face plate consists of a circular disc bored out and a chuck is device of lathe attached to the spindle by means of bolts with back late screwed on to the spindle nose.
Q. The spindle was directly driven by_____ in later machine.
A. flat belt pulley
B. gear box
C. flat belt pulley and gear box both
D. none of the mentioned
.
Answer: B
Explanation: Spindle was driven by gear box ( driven by electric motor) in later machine. It is a disc or plate type structure connected to the shaft.
Q. The spindle was directly driven by_____ in older machine.
A. flat belt pulley
B. gear box
C. flat belt pulley and gear box both
D. none of the mentioned
.
Answer: A
Explanation: The spindle was directly driven by flat belt pulley in older machine. Flat pulley generally made up of cast iron, steel, wood, plastic and paper and used with a belt drive is known as flat belt drive.
Q. In how many parts, compound rest can be classified?
A. 2
B. 3
C. 4
D. 5
.
Answer: A
Explanation: Compound rest can be classified in two parts : swivel base and top slide.
Q. The swivel base is assembled to the_____ of cross slide.
A. top
B. middle
C. bottom
D. none of the mentioned
.
Answer: A
Explanation: The swivel bas is always assembled to the top of the cross slide as per the construction of the lathe. The compound rest may be clamped at any desired position by tightening the T-bolts.
Q. How many types of movements are possible in carriage?
A. 2
B. 3
C. 4
D. none of the mentioned
.
Answer: B
Explanation: Three types of feed are possible in carriage. Longitudinal feed, cross feed and angular feed are possible in case of the carriage.
Q. Which type of operation is possible for the top slide?
A. manual
B. by power feed
C. manual and by power feed both
D. none of the mentioned
.
Answer: A
Explanation: Only manual operation is possible for the cross feed. The top slide assists in feeding the tool to the work.
Q. Which type of feed is always done perpendicular to the axis of work?
A. longitudinal feed
B. angular feed
C. cross feed
D. none of the mentioned
.
Answer: C
Explanation: Cross feed is always done perpendicular to the axis of the work as per the classification of carriage movements. Cross feed is done with the help of the cross-slide movement.
Q. Which of the following is not true for compound rest?
A. the swivel base is provided with a dovetail on its bottom surface
B. the top slide has dovetail groove
C. the assembly of the top slide to the swivel base is done by a tapered jib
D. none of the mentioned
.
Answer: A
Explanation: All the sentences are true except the one which says that the swivel base is provided with a dovetail on its bottom surface. The swivel base is provided with a dovetail on its top surface.
Q. Taper jib can be adjusted to control the swivel base movements.
A. true
B. false
.
Answer: B
Explanation: This is false. Taper jib can be adjusted to control top slide movements.
Q. Which of the following is not true?
A. sliding over the bed is done by the operation of the hand wheel in saddle
B. the top of the cross slide has got a dovetail groove machined
C. the sliding of the top slide on the swivel bas is accomplished
by the help of a screw-rod
D. none of the mentioned
.
Answer: B
Explanation: All the sentences are true except the one which says that the top of the cross slide has got a dovetail groove machined. The bottom of the cross slide has got a dovetail groove machined.
Q. In compound rest, the screw-rod is fitted with_____
A. a hand wheel
B. a graduated collar
C. a hand wheel and a graduated collar both
D. none of the mentioned
.
Answer: C
Explanation: These both are used for the fitting of the screw-rod. The sliding of the top slide on the swivel base is accomplished by the help of this screw-rod.
Q. Which type of feed is necessary for the function of the cross slide?
A. hand feed
B. automatic feed
C. either by hand feed or by automatic feed
D. none of the mentioned
.
Answer: C
Explanation: Function of cross slide can be done either by hand or by manual. This cross-slide functions perpendicular to the lathe axis.
Q. Carriage provides various movements for the cutting tool______
A. manually
B. by power feed
C. manually and by power feed both
D. none of the mentioned
.
Answer: C
Explanation: These two types of movements are possible in carriage. Carriage provides various movements for the cutting tool.
Q. Carriage is the part of lathe which slides over the bed ways.
A. true
B. false
.
Answer: A
Explanation: This is the function of carriage. It can be locked on the bed at any desired position by tightening the carriage lock-screw.
Q. The compound rest may be clamped at_____
A. 0 degree
B. 90 degree
C. 180 degree
D. any degree between 0 and 360
.
Answer: D
Explanation: Compound rest may be clamped at any required position between 0 and 360 degree. It can be tightened by T-bolts at that position.
Q. Which type of feed is always done parallel to the axis of work?
A. longitudinal feed
B. cross feed
C. angular feed
D. none of the mentioned
.
Answer: A
Explanation: Longitudinal feed is always done parallel to the axis of the work as per the classification of carriage movements.
Q. Which of the following assists in feeding the tool to the work?
A. swivel base
B. top slide
C. swivel base and top slide both
D. none of the mentioned
.
Answer: B
Explanation: Only top slide assists in feeding the tool to the work. We can give manual operation in the top slide.
Q. Which type of feed is done with the help of compound slide movement?
A. longitudinal feed
B. angular feed
C. cross feed
D. none of the mentioned
.
Answer: B
Explanation: Angular feed is done with the help of the compound slide movement positioned at an angle to the axis of the work.
Q. In how many parts, carriage can be divided?
A. 2
B. 3
C. 4
D. 5
.
Answer: D
Explanation: Carriage can be divided in saddle, cross-slide, compound rest swivel and top slide, tool post and apron.
Q. Saddle is_____ shaped casting and has_____ guide grooves and flat grooves.
A. H and V
B. V and H
C. H and H
D. V and V
.
Answer: A
Explanation: Saddle is H shaped casting and has v guide grooves and flat grooves. Saddle is mounted on the spindle.
Q. In saddle, grooves are machined at the ______ corresponding to the lathe bed ways.
A. top face
B. middle face
C. bottom face
D. none of the mentioned
.
Answer: C
Explanation: In saddle, grooves are machined at the bottom corresponding to the lathe bed ways. The surface of the bed in contact with the sliding units of the lathe are known as guideways or slideways or bedways.
Q. The cross slide functions_____ to the lathe axis.
A. parallel
B. perpendicular
C. anti-parallel
D. none of the mentioned
.
Answer: B
Explanation: The cross slide functions perpendicular to the lathe axis. The bottom of the cross-slide has got a dovetail groove machined, which corresponds to the external dovetail machined on the saddle.
Q. The tool post is assembled to the swivel base.
A. true
B. false
.
Answer: B
Explanation: The tool post is assembled to the top slide. The tool post holds the tool or tools meant for operations to be performed on the work.
Q. Which of the following is the part of single way tool post?
A. ring base
B. rocket arm
C. a tool clamping screw
D. all of the mentioned
.
Answer: D
Explanation: Single way tool post consists of these all parts. This tool post is consist of a circular tool post body with a slot for accommodating the tool or tool holder.
Q. The tool is positioned on rocket arm and clamped in case of single way tool post.
A. true
B. false
.
Answer: A
Explanation: This is true. The ring base, a rocket arm and a tool clamping screw complete the assembly of this type of tool post.
Q. In single way tool post, the center height of the tool tip can be adjusted with the help of_____
A. rocket arm
B. ring base
C. rocket arm and ring base both
D. none of the mentioned
.
Answer: C
Explanation: Both rocket arm and ring base are used for this purpose. The rigidity of the tool is less as it is clamped with only one bolt.
Q. Four bolt tool post is held in position by____ straps and _____ bolts.
A. 2 and 4
B. 4 and 2
C. 2 and 2
D. 4 and 4
.
Answer: A
Explanation: It is held by 2 straps and 4 bolts. This type of tool post provides a very firm support for either a single or double tool set-up. This is, therefore, often fitted to heavy duty lathes.
Q. Loosing coil springs are fitted on each strap in four bolt tool post.
A. true
B. false
.
Answer: B
Explanation: This is false. Loosing coil springs are fitted on each bolt to keep the straps in place. Adjustment of the tool height can be made by using parallel packing strips under the tools.
Q. Open slide tool post is clamped in position by_____ set screws.
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: Open slide tool post is clamped in position by 2 set screws. This tool is held quite independent of the main fixing bolt.
Q. In which tool post, quick replacement of the tool is ensured?
A. single way tool post
B. four bolt tool post
C. open slide tool post
D. none of the mentioned
.
Answer: C
Explanation: In open slide tool post, the tool post slide can be swiveled to any desired position after loosening the central bolt which slides in a T-slot.
Q. Four way tool post is also known as_____
A. square tool post
B. indexing type tool post
C. square tool post and indexing type tool post both
D. none of the mentioned
.
Answer: C
Explanation: These both terms square tool post and indexing type tool post are used as the synonyms of the four way tool post. Four tools can be fixed in this types of tool post and any one can be bought to the operating position and the square head is clamped with the help of the locking lever.
Q. The indexing is automatic in four way tool post.
A. true
B. false
.
Answer: B
Explanation: The indexing may be manual or automatic in four way tool post.
Q. Four bolt tool post provides a very firm support for_____
A. single tool set up
B. double tool set up
C. either single or double tool set up
D. none of the mentioned
.
Answer: C
Explanation: Four tool post provides firm supports for both single or double tool set up. In this tool post, each tool is secured in the tool post by more than one bolt and so the rigidity is more.
Q. Which of the following is not true for four bolt tool post?
A. adjustment for the tool height can be made by using parallel
strips under the tools
B. this type of tool post does swivel in itself
C. setting of the tool in any desired angle is affected by the
adjustment of the compound slide
D. none of the mentioned
.
Answer: B
Explanation: All the mentioned sentences are true except the one which says that this type of tool post does swivel in itself. Actually, This type of tool post does swivel itself.
Q. Which of the following is not true for open slide tool post?
A. the tool is held quite independent of the main fixing bolt
B. the height of the cutting point can be adjusted by using
parallel packing strips
C. the tool post slide can be swiveled to only parallel or
perpendicular position
D. none of the mentioned
.
Answer: C
Explanation: The tool post slide can be swiveled to any desired position after loosening the central bolt ( by a handle ) which slides in a T-slot.
Q. Which of the following is not true for four way tool post?
A. each tool is secured in the tool post by one bolt
B. square head is clamped with the help of the locking lever
C. it takes more time to set the center height
D. none of the mentioned
.
Answer: A
Explanation: All sentences are true except the one which says that each tool is secured in the tool post by one bolt. Actually, each tool is secured in the tool post by more than one bolt in order to obtain more rigidity.
Q. Frequent changing of the tool for different operations need
not be done in four way tool post.
A. true
B. false
.
Answer: A
Explanation: Frequent changing of the tool for different operation need not be done in four way tool post as four tools can be clamped.The disadvantage is that skill is required to set the tools and it takes more time to set the center height.
Q. Which of the following contains friction clutches?
A. saddle
B. cross slide
C. swivel base
D. apron
.
Answer: D
Explanation: Apron includes friction clutches. Friction clutches are there in apron for the purpose of automatic feeding.
Q. The layout of the_____ includes an interlocking device.
A. saddle
B. cross slide
C. apron
D. swivel base
.
Answer: C
Explanation: The layout of the apron includes an interlocking tool which prevents or stops the simultaneous engagement of feed shaft and the lead screw.
Q. The apron hand wheel can be turned to move carriage back and forth longitudinally with the help of hand. The complementary motion to this is obtained by______ handle.
A. longitudinal feed
B. cross feed
C. angular feed
D. none of the mentioned
.
Answer: B
Explanation: The complementary motion to this is obtained by the cross feed handle which moves the cross slide and forth across the saddle.
Q. In apron, which type of feed is used to operate the carriage?
A. hand feed
B. power feed
C. hand feed and power feed both
D. none of the mentioned
.
Answer: C
Explanation: Both type of feed is used to operate the carriage. Although hand feed takes more time and gives less accuracy while power feed takes less time and gives more accuracy.
Q. In which position, the section lever can be kept?
A. up and down
B. up, down and neutral
C. only neutral
D. none of the mentioned
.
Answer: B
Explanation: The section lever can be kept in all above mentioned positions to handle the feed. This apron is a part of lathe hangs over the front of the feed.
Q. With the help of how many half nuts, apron provide power feed to the carriage at the time of thread cutting?
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: Generally 2 half nuts are used for this purpose. In addition, there is a split nut which engages when required with the lead screw, when cutting either internal or external thread.
Q. In Apron, power is transmitted from spindle to_____
A. lead screw
B. feed rod
C. lead screw and feed rod both
D. none of the mentioned
.
Answer: C
Explanation: Power is transmitted to both lead screw and feed rod from spindle. The layout of this apron includes an interlocking device which prevents the simultaneous engagement of the feed shaft and the lead screw.
Q. Which of the following mechanism is used for the purpose of power transmission from the spindle?
A. spindle gear arrangement
B. tumbler gear arrangement
C. spindle gear arrangement and tumbler gear arrangement both
D. none of the mentioned
.
Answer: C
Explanation: These both gear arrangements are used for the purpose of power transmission. In addition to this, there is hand wheel in apron which can be turned to move carriage back and forth longitudinally by hand for manual power.
Q. A worm is fixed on the lead screw.
A. true
B. false
.
Answer: B
Explanation: This is false. A warm is fixed on the feed rod with the help of the sliding key.
Q. Which of the following is suspended from the saddle?
A. apron
B. gear box
C. tool post
D. none of the mentioned
.
Answer: A
Explanation: Apron is fastened to the spindle and hangs over the front of the bed. It is the part of carriage.
Q. Which type of feeding does feed mechanism enables?
A. automatic
B. manual
C. automatic and manual both
D. none of the mentioned
.
Answer: A
Explanation: Feed mechanism enables automatic feed. It enables feeding for the tool longitudinal and traversely whenever needed.
Q. Which of the following indicates the benefit of automatic feeding?
A. the finish on the work will be better
B. the feeding of the tool will be at a nonuniform continuous rate
C. accuracy will be more
D. all of the mentioned
.
Answer: D
Explanation: All sentences are true except the one which says that the feeding of the tool will be at a nonuniform continuous rate. Actually, the feeding of the tool will be at a uniform continuous rate.
Q. Automatic feed requires more time to finish the work.
A. true
B. false
.
Answer: B
Explanation: This is false. Manual feed requires more time for finishing the work. Automatic feed requires less time to finish the work.
Q. Which of the following is the part of feed mechanism?
A. spindle gear
B. tumbler gear unit
C. apron mechanism
D. all of the mentioned
.
Answer: D
Explanation: All are the parts of feed mechanism. Apart from spindle gear, tumbler gear unit and apron mechanism, there are some other parts like fixed stud gear, change gear unit, quick change gear box and so on.
Q. Feed mechanism requires manual labor.
A. true
B. false
.
Answer: B
Explanation: This is work. Feed mechanism removes the need of manual labor. It works automatically.
Q. The feed of a cutting tool in a lathe work is the distance the tool advances for each revolution.
A. true
B. false
.
Answer: A
Explanation: This is the definition of the feed. This feed is also expressed in mm/revolution. In british system, it is expressed in inch per revolution.
Q. What happen if feed increases?
A. cutting time increases
B. cutting time decreases
C. no effect on cutting time
D. none of the mentioned.
.
Answer: B
Explanation: Increased feed always reduces the cutting time. As the feed is increased, the speed of the cutting is increased and as the speed of the cutting is increased, its time will definitely decreased.
Q. Increased feed_____
A. increases tool’s life
B. decreases tool’s life
C. no effect on tool’s life
D. none of the mentioned
.
Answer: B
Explanation: Increased feed greatly reduces the tool life. As the feed is increased, its speed will also increased. So forces acting on the tool will be more stronger, more powerful. Hence, it reduces the tool’s life.
Q. Which of the following is not the part of the feed mechanism?
A. fixed stud gear
B. quick change gear box
C. feed shaft
D. none of the mentioned
.
Answer: D
Explanation: These all are the parts of the feed mechanism. Due to these all parts, it works more accurately and give the more-better surface finish.
Q. The feed mechanism enables feed for the tool______ whenever needed.
A. longitudinally
B. traversely
C. longitudinal and traversely both
D. none of the mentioned
.
Answer: C
Explanation: The proportionate tool movement for each revolution of the work is achieved through all units of the feed mechanism.
Q. Which type of feeding does feed mechanism enables?
A. automatic
B. manual
C. automatic and manual both
D. none of the mentioned
.
Answer: A
Explanation: Feed mechanism enables automatic feed. It enables feeding for the tool longitudinal and traversely whenever needed.
Q. Which of the following indicates the benefit of automatic feeding?
A. the finish on the work will be better
B. the feeding of the tool will be at a nonuniform continuous rate
C. accuracy will be more
D. all of the mentioned
.
Answer: D
Explanation: All sentences are true except the one which says that the feeding of the tool will be at a nonuniform continuous rate. Actually, the feeding of the tool will be at a uniform continuous rate.
Q. Automatic feed requires more time to finish the work.
A. true
B. false
.
Answer: B
Explanation: This is false. Manual feed requires more time for finishing the work. Automatic feed requires less time to finish the work.
Q. Which of the following is the part of feed mechanism?
A. spindle gear
B. tumbler gear unit
C. apron mechanism
D. all of the mentioned
.
Answer: D
Explanation: All are the parts of feed mechanism. Apart from spindle gear, tumbler gear unit and apron mechanism, there are some other parts like fixed stud gear, change gear unit, quick change gear box and so on.
Q. Feed mechanism requires manual labor.
A. true
B. false
.
Answer: B
Explanation: This is work. Feed mechanism removes the need of manual labor. It works automatically.
Q. The feed of a cutting tool in a lathe work is the distance the tool advances for each revolution.
A. true
B. false
.
Answer: A
Explanation: This is the definition of the feed. This feed is also expressed in mm/revolution. In british system, it is expressed in inch per revolution.
Q. What happen if feed increases?
A. cutting time increases
B. cutting time decreases
C. no effect on cutting time
D. none of the mentioned.
.
Answer: B
Explanation: Increased feed always reduces the cutting time. As the feed is increased, the speed of the cutting is increased and as the speed of the cutting is increased, its time will definitely decreased.
Q. Increased feed_____
A. increases tool’s life
B. decreases tool’s life
C. no effect on tool’s life
D. none of the mentioned
.
Answer: B
Explanation: Increased feed greatly reduces the tool life. As the feed is increased, its speed will also increased. So forces acting on the tool will be more stronger, more powerful. Hence, it reduces the tool’s life.
Q. Which of the following is not the part of the feed mechanism?
A. fixed stud gear
B. quick change gear box
C. feed shaft
D. none of the mentioned
.
Answer: D
Explanation: These all are the parts of the feed mechanism. Due to these all parts, it works more accurately and give the more-better surface finish.
Q. The feed mechanism enables feed for the tool______ whenever needed.
A. longitudinally
B. traversely
C. longitudinal and traversely both
D. none of the mentioned
.
Answer: C
Explanation: The proportionate tool movement for each revolution of the work is achieved through all units of the feed mechanism.
Q. How many main type of centres are there in lathe (most commonly)?
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: Most commonly two types of centres are there in lathe : live and dead centres.
Q. Which of the following is not the type of centre in lathe?
A. live centre
B. neutral centre
C. dead centre
D. none of the mentioned
.
Answer: B
Explanation: Only live centre and dead centre are there in lathe. These two centres take up the thrust due to metal cutting and the entire load of the workpiece on small bearing surface.
Q. In which type of lathe centre, the hard tip is wear resistant?
A. tipped centre
B. revolving centre
C. ordinary centre
D. half centre
.
Answer: A
Explanation: In tipped centre, the hard tip is wear resistant. Wear resistant means they are not easily affected by friction or any other damage
Q. Why lathe centres are made of very hard materials?
A. to resist deflection
B. to resist wear
C. to resist deflection and wear both
D. none of the mentioned
.
Answer: C
Explanation: Lathe centres are made of very hard to resist these both things-deflection and wear. The dead centre is subjected to wear due to friction.
Q. Which type of centre is particularly suitable for taper turning?
A. ball centre
B. female centre
C. half centre
D. none of the mentioned
.
Answer: A
Explanation: Ball centre is particularly suitable for taper turning as per the definition of the ball centre. It has minimum wear and strain.
Q. What is the included angle of centre for general purpose work?
A. 30
B. 45
C. 60
D. 75
.
Answer: C
Explanation: The included angle is usually 60 for general purpose work. Also, the included angel for heavy work is 7Q.
Q. The shanks of all the centres are machined to the Morse 0 to 3 tapers.
A. true
B. false
.
Answer: B
Explanation: This is false. Generally, the shank of all the centres is machined to the Morse 0 to 6 tapers.
Q. Lathe centers are mde up of very hard materials.
A. true
B. false
.
Answer:a
Explanation: This is true. These lathe centers are made up of very hard materials as they have to resist entire load of the workpiece and thrust.
Q. The shanks of all the centres are machined to the metric 2 to 4 standard taper.
A. true
B. false
.
Answer: B
Explanation: This is false. Generally, the shank of all the centres are machined to the metric 4 to 6 standard taper.
Q. Which of the following is the type of lathe centres?
A. ordinary centre
B. tipped centre
C. ball centre
D. all of the mentioned
.
Answer: D
Explanation: These all are the types of lathe centres. Apart from ordinary centre, tipped centre and ball entre, some other type centres are also there like half centre, pipe centre, revolving centre, insert type centre, self driving centre, female centre and so on.
Q. Only the small high-speed steel insert is replaced.
For which type of centre, above sentence is true?
A. ball centre
B. swivel V centre
C. ordinary centre
D. none of the mentioned
.
Answer: D
Explanation: Non of the mentioned option is correct. Above sentence is true for insert-type centre.
Q. Self-driving live centre can be used only for soft jobs.
A. true
B. false
.
Answer: A
Explanation: Self-driving live centre can be used only for soft jobs and not for hardened jobs. It bis used while machining the entire length of the job in one setting.
Q. Grooves cut along the diameter of the centre point provide for
good gripping of the job and for getting the drive, in self-driving live centre.
A. true
B. false
.
Answer: B
Explanation: This is false. Grooves cut around the circumference of the centre point provide for good gripping of the job and for getting the drive.
Q. Which type of centre is used to drill holes across the round job
by using a drill bit in the head-stock spindle?
A. swivel V centre
B. female centre
C. half centre
D. none of the mentioned
.
Answer: A
Explanation: Swivel V centre is used to drill holes across the round job by using a drill bit in the head-stock spindle as per the definition of this centre. This centre is used to support a job in the V section.
Q. Half centre is also known as common type centre.
A. true
B. false
.
Answer: B
Explanation: This is false. Ordinary centre is also known as common type centre.
Q. Which type of centre is used while facing the job without disturbing the setting?
A. ball centre
B. pipe centre
C. half centre
D. revolving centre
.
Answer: C
Explanation: Half centre is used while facing the job without disturbing the setting as per the classification of the lathe centres. Though it is termed as half centre, little less than half is relieved at the tip portion.
Q. The centres take up_______
A. thrust due to metal cutting
B. entire load of the work piece on small bearing surface
C. thrust due to metal cutting and entire load of the work piece on small bearing surface both
D. none of the mentioned
.
Answer: C
Explanation: The centres take up the thrust due to metal cutting and load on small bearing surface. So they are made of very hard materials.
Q. A carbide or a hard alloy tip is brazed into an ordinary steel shank. For which type of centre, above sentence is true?
A. pipe centre
B. half centre
C. female centre
D. tipped centre
.
Answer: D
Explanation: Above statement is true for the tipped centre as per the definition of the tipped centre. The hard tip is wear resistant in case of tipped centre. For tipped centres, a tip tool is there which is made of separate material clamped on separate body.
Q. The live centre is subjected to wear due to friction.
A. true
B. false
.
Answer: B
Explanation: This is false. The dead centre is subjected to wear due to friction.
Q. In which type of lathe centre, minimum wear and strain are obtained?
A. pipe centre
B. ball centre
C. insert-type centre
D. none of the mentioned
.
Answer: B
Explanation: In ball centre, minimum wear and strain are obtained. This ball centre is particularly suitable for taper turning.
Q. In pipe centre, friction is there.
A. true
B. false
.
Answer: B
Explanation: This is false. Pipe centre is frictionless. It is used for supporting pipes shells and hollow end jobs.
Q. In revolving centre, a high speed steel inserted centre is supported by_____ bearings housed in a body.
A. 1
B. 3
C. 2
D. none of the mentioned
.
Answer: C
Explanation: In revolving centre, a high speed steel inserted centre is supported by 2 bearings housed in a body as per the definition of the revolving centre. It is used for heavy jobs and jobs revolving with high speeds.
Q. Revolving centre is also known as revolving live centre.
A. true
B. false
.
Answer: B
Explanation: This is false. Revolving centre is also known as revolving dead centre.
Q. Which of the following centre is more economical?
A. insert-type centre
B. pipe centre
C. half centre
D. none of the mentioned
.
Answer: A
Explanation: Insert-type centre is more economical as per the definition of this centre. In this centre, only the small high-speed steel insert is replaced.
Q. Which type of centre is used while machining the entire length
of the job in one setting?
A. swivel V centre
B. female centre
C. self-driving live centre
D. pipe centre
.
Answer: C
Explanation: Self-driving live centre is used while machining the entire length of the job in one setting as per the working of this centre. Self driving live centre is usually mounted on the headstock.
Q. Which type of centre is used to support the end of the job
where no countersink hole is permitted?
A. ordinary centre
B. half centre
C. female centre
D. none of the mentioned
.
Answer: C
Explanation: Female centre is used to support the end of the job where no countersink hole is permitted as per the definition of this centre. Here, countersink hole means a conical hole cut into an object.
Q. Which of the following is not the type of lathe centre?
A. pipe centre
B. revolving centre
C. insert-type centre
D. none of the mentioned
.
Answer: D
Explanation: All are the types of lath centres. Insert type centre is more economical compare to other centres.
Q. Self-driving live centre is usually mounted on the tailstock.
A. true
B. false
.
Answer: B
Explanation: This is false. Self-driving live centre is usually mounted on the head stock spindle.
Q. Carriers are also known as lathe dogs.
A. true
B. false
.
Answer: A
Explanation: Lathe dogs term is also used for describing carriers. The carriers consist of a clamping screw.
Q. Which of the following is used to drive the work during turning?
A. catch plates
B. carriers
C. both catch plates and carriers
D. none of the mentioned
.
Answer: C
Explanation: Both catch plates and carriers are used to drive the work during turning. A projecting pin from the catch plate or carrier fits into the slot provided in either of them.
Q. The work is clamped firmly by a set screw in the lathe_____
A. catch plates
B. carriers
C. both catch plates and carriers
D. none of the mentioned
.
Answer: B
Explanation: The work is clamped in the lathe carriers. It is done by a set of screw. A positive drive between the lathe spindle and workpiece is also imparted.
Q. The catch plates are_____
A. screwed
B. bolted
C. either screwed or bolted
D. none of the mentioned
.
Answer: C
Explanation: The catch plated are either screwed or bolted. A projecting pin of a single pin catch plate drives the straight end or tail of a carrier attached to the work piece.
Q. The catch plates are bolted to the nose of headstock spindle.
A. true
B. false
.
Answer: B
Explanation: This is false. The catch plates are bolted to the nose of tailstock spindle.
Q. The carrier may consists of_____
A. cast iron
B. forged steel body
C. clamping screw
D. all of the mentioned
.
Answer: D
Explanation: The carrier may consist of a cast iron or forged steel body and a clamping screw. To protect the finished surface from damages, a soft metal packing piece is used under this clamping screw.
Q. Generally, the carrier is available in a set of Q.
A. true
B. false
.
Answer: B
Explanation: This is false. Generally, The carrier is available in a set of Q.
Q. The tails of the carrier is meant to_____
A. locate the work piece
B. drive the work piece
C. both locate the work piece and drive the work piece
D. none of the mentioned
.
Answer: C
Explanation: The tail of the carriers are meant to locate and drive the work piece for turning. Two pins of a double catch plate engage with the double tail or double slotted carrier and provide uniform driver.
Q. To protect the finished surface from damages, a hard metal packing piece is used under the clamping screw.
A. true
B. false
.
Answer: B
Explanation: This is false. To protect the finished surface from damages, a soft metal packing piece is used under the clamping screw.
Q. Which of the following is the type of catch plate?
A. single pin catch plate
B. double pin catch plate
C. double slotted catch plate
D. all of the mentioned
.
Answer: D
Explanation: All mentioned are the types of catch plates. These are used to drive the work during turning.
Q. The bent tail type is used in conjunction with_____
A. a face plate
B. a slotted catch plate
C. a face plate or a slotted catch plate
D. none of the mentioned
.
Answer: C
Explanation: The bent type is used in conjunction with a face plate or a slotted catch plate. A face plate consists of a circular disc bored out and threaded to sit the nose of the lathe spindle.
Q. Which of the following is not true?
A. the projecting pin of a single pin catch plate drives the straight end or tail of a carrier attached to the work piece
B. two pins of a double pin catch plate engage with the double tail or double slotted carrier
C. two pins of a double pin catch plate provide non-uniform drive
D. none of the mentioned
.
Answer: D
Explanation: All above mentioned statements are right except the one which says that two pins of a double pin catch plate provide non-uniform drive. Actually, it provide uniform drive.
Q. Which of the following is not the type of carrier?
A. straight tail carrier
B. double slotted carrier
C. double tail carrier
D. none of the mentioned
.
Answer: D
Explanation: All above mentioned are the types of carrier. These carriers are capable of accommodating work of wide range of diameters.
Q. Three jaw chuck is also known as _____
A. universal chuck
B. self-centering chuck
C. universal or self-centering chuck
D. none of the mentioned
.
Answer: C
Explanation: Three jaw chuck is also known as universal or self centering chuck. The majority of the chucks have two sets of jaws for holding internal and external diameters.
Q. A chuck is attached to_____
A. lathe spindle
B. lathe apron
C. lathe tool post
D. none of the mentioned
.
Answer: A
Explanation: A chuck is attached to lathe spindle. This attachment is done with the help of bolts with the back plate. (as per the construction of the lathe.)
Q. Back plate is screwed on the spindle nose.
A. true
B. false
.
Answer: A
Explanation: Back plate is screwed on the spindle nose. Accurate alignment of the chuck with the lathe axis is effected by spigotting.
Q. Which type of work should be held in three jaw chuck?
A. perfectly round work
B. work with equally spaced flats
C. perfectly round work and work with equally spaced
D. none of the mentioned
.
Answer: C
Explanation: Only perfectly round work or work with equally spaced flats, divisible by three should be held in a three jaw chuck.
Q. Which of the following chuck is also known as hydraulic chuck?
A. combination chuck
B. drill chuck
C. none of the mentioned
D. magnetic chuck
.
Answer: C
Explanation: The answer should be none of mentioned. None of above is known as hydraulic chuck. Actually, air chuck is known as hydraulic chuck.
Q. Which of the following chuck is also known as dog chuck?
A. four jaw chuck
B. three jaw chuck
C. two jaw chuck
D. none of the mentioned
.
Answer: A
Explanation: Dog chuck is also used for describing the four jaw chuck. Four jaw chuck is also known as independent chuck.
Q. In four jaw chuck, work can be turned within_____ mm accuracy.
A. 22
B. Q.2
C. 0.022
D. 0.0022
.
Answer: C
Explanation: In four jaw chuck, work can be turned within 0.022 mm accuracy.As per the theory of four jaw chuck, this chuck also provides the facility of deliberately setting the work off-centre to produce eccentric workpiece.
Q. Four jaw chuck is dependent chuck.
A. true
B. false
.
Answer: B
Explanation: This is false. Four jaw chuck is independent chuck since each jaw can be adjusted independently.
Q. Four jaw chuck can be constructed lightly as compare to self centering chuck.
A. true
B. false
.
Answer: B
Explanation: This is false. Four jaw chuck is much more heavily constructed than self-centering chuck.
Q.Which of the following is not true regarding four jaw chuck?
A. Each jaw can be adjusted independently.
B. Movement of jaw is irreversible.
C. Movement of jaw is done by the help of square threaded screw.
D. None of the mentioned
.
Answer: B
Explanation: All the sentences are true except the one which says that movement of jaw is irreversible. Actually, in this chuck, movement of jaw is reversible.
Q. Which of the following is not true regarding four jaw chuck?
A. The diameter of the body specifies the size of the work.
B. Concentric circles inscribed on the chuck facilitate quick
centering of the work piece.
C. Four jaw chuck has four pairs of jaws.
D. None of the mentioned
.
Answer: C
Explanation: All sentences are true except the one which says that four jaw chuck has four pairs of jaws. In fact, it has four independent jaws.
Q. Which of the following is the part of the four jaw chuck?
A. back plate
B. shaft chuck key
C. screw
D. all of the mentioned
.
Answer: D
Explanation: All are parts of the chuck. Apart from back plate, shaft chuck key and screw, key socket, square thread screw, thrust pad, spindle nose are also the part of the four jaw chuck.
Q. In four jaw chuck, a work piece can be set to run_____ by suitable adjustment of the jaws.
A. true
B. eccentric
C. true or eccentric
D. none of the mentioned
.
Answer: C
Explanation: A work piece can be set to run true or eccentric as required. In 4 jaw chuck, each works independently of the others in its own slot in a chuck body.
Q. T-slots are provided on the bottom of the chuck.
A. true
B. false
.
Answer: B
Explanation: This is false. T-slots are provided on the face of the chuck to accommodate T bolts.
Q. T bolts are used for_____
A. clamping irregular works
B. assembling balance weights
C. both clamping irregular works and assembling balance weights
D. none of the mentioned
.
Answer: C
Explanation: T bolts are used for these both clamping irregular works and assembling balance weights Concentric circles inscribed on the chuck facillitate quick centering of the workpiece. The diameter of the body specifies the size of the work.
Q. Angle plate is a cast iron plate.
A. true
B. false
.
Answer: A
Explanation: Angle plates are always used along with face plates and for its stability it is made up of iron.
Q. How many machined faces do angle plates have?
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: Angle plates have two plates. Both of these plates are placed perpendicular to each other.
Q. Which of the following is provided on the faces of angle plates?
A. holes
B. slots
C. holes and slots both
D. none of the mentioned
.
Answer: C
Explanation: Holes and slots both are provided on the faces of angle plates so that it may be clamped on a face plate and can hold the work piece on the other face.
Q. Angle plates are used in conjunction with a face plate.
A. true
B. false
.
Answer: A
Explanation: Angle plates are used in conjunction with a face plate. It can be easily understood by looking at the working of the angle plates.
Q. In angle plates, clamping is used for______
A. elbow pipe
B. angle plate
C. both elbow pipe and angle plate
D. none of the mentioned
.
Answer: C
Explanation: Clamping is used for this both purposes. Angel plate is used in machining a flange of a pipe elbow.
Q. Which of the following is not true for angle plates?
A. when eccentric jobs are bolted to the face plate, counter weight must be added
B. in machining a flange of a pipe elbow, the surface which holds the work piece must be placed horizontal
C. for balance weight, angle plates are used
D. none of the mentioned
.
Answer: D
Explanation: All sentences are true. These all are the mechanisms related to angel plates. Angel plates are used along with face plates when work can not be done by chucks or when we need higher accuracy.
Q. Face plates are used with_____ accessories.
A. clamps
B. T- bolts
C. stepped block
D. all of the mentioned
.
Answer: D
Explanation: Face plates are used with all mentioned accessories. A face plate plate has radial plain and T slots for holding work by bolts and clamps.
Q. For holding work pieces, which cannot be conveniently between centers, _____ is used.
A. three jaw chuck
B. four jaw chuck
C. face plates
D. all of the mentioned
.
Answer: C
Explanation: Face plates are used for these purposes. The work piece include large flat, irregular shaped workpieces, casting, jigs and fixture may be firmly clamped to a face plate for various turning operations.
Q.The position of the bolts and clamps is very important in face plates.
A. true
B. false
.
Answer: A
Explanation: The position of the bolts and clamps is very important in face plates, if a work piece is to be clamped effectively. Various types of face plates are used for proper clamping like face plates with elongated slots, face plates with elongated radial slots and so on.
Q. Which of the following is not true for face plates?
A. a face plate consists of a circular disc bored out
B. the work piece includes casting and jigs may not be clamped by using face plates
C. face plates are used as an alternative option of chucks
D. none of the mentioned
.
Answer: B
Explanation: All the mentioned sentences are true except one which says that the work piece includes casting and jigs may not be clamped by using face plates. The work piece includes casting and jibs may be firmly clamped by using face plates.
Q. Face plates has_____ for holding work by bolts and clamps.
A. radial plain
B. slots of T type
C. both radial plain and T slots
D. none of the mentioned
.
Answer: C
Explanation: These both are used for holding work by bolts and clamps. This face plate is a circular disc bored out and threaded to sit the nose of the lathe spindle.
Q. Faces of angle plates are_____ to each other.
A. parallel
B. perpendicular
C. inclined
D. none of the mentioned
.
Answer: B
Explanation: Faces are perpendicular to each other in case of angle plates. This angel plates are used in balance weight, ello pipe and so on.
Q. Work piece can be hold on a face plate by_____
A. bolts
B. clamps
C. both bolts and clamps
D. none of the mentioned
.
Answer: C
Explanation: Work piece can be hold on a face plate by bolts and clamps for various turning operations. Although apart from turning, we can also perform various operations.
Q. Mandrels are used for holding solid work piece.
A. true
B. false
.
Answer: B
Explanation: This is false. Mandrels are used for holding hollow work piece.
Q. Which of the following is not true?
A. the work piece must have their bores machined accurately
B. the mandrels are to be located before the centres
C. mandrels are used for turning concentric
D. none of the mentioned
.
Answer: B
Explanation: All the sentences are true except one which says that the mandrel are to be located before the centres. The mandrels should be located in between the centres.
Q. Mandrels are driven by_____
A. catch plates
B. carriers
C. catch plates and carriers both
D. none of the mentioned
.
Answer: C
Explanation: Both are used to drive the mandrels. Catch plates are either screwed or bolted to the nose of the tailstock spindle while the carriers consist of a cast iron or forged steel body.
Q. The diameters at the beginning are slightly smaller and flattened.
A. true
B. false
.
Answer: B
Explanation: This is false. The diameters at the end are slightly smaller and flattened to provide effective gripping surface of the lathe dog set screw..
Q. Why gripping mandrels are made of high carbon steel?
A. to avoid distortion
B. to avoid wear
C. both to avoid distortion and wear
D. none of the mentioned
.
Answer: C
Explanation: The gripping mandrels are made of high carbon steel to avoid both distortion and wear. Along with this, the gripping power of this mandrels is not much.
Q. Less common but very often used method is_____
A. parallel mandrel
B. threaded cone mandrel
C. both parallel mandrel and threaded cone mandrel
D. none of the mentioned
.
Answer: C
Explanation: There are several types of mandrels in use depending upon the specific requirements of the job. Less common but very often used is the parallel mandrel and the threaded cone mandrel.
Q. The mandrels are driven into the work by tapping by_____
A. copper hammers
B. lead hammers
C. copper hammer and lead hammer both
D. none of the mentioned
.
Answer: C
Explanation: The mandrels are driven into the work by tapping with copper and lead hammers or by an arbor press or by mandrel press.
Q. Which of the following is not true?
A. the mandrels are used depending upon the specific requirements of the job.
B. the gripping power of mandrels is very high
C. effective gripping surface of the lathe dog set screw is done
D. none of the mentioned
.
Answer: B
Explanation: All mentiones sentences are true except one which says that the gripping power of the mandrel is very high. The gripping power of the mandrels is not much.
Q. Which of the following is the type of mandrels?
A. plain mandrels
B. stepped mandrels
C. collar mandrels
D. all of the mentioned
.
Answer: D
Explanation: All of mentioned are the types of mandrels. Apart from these other types of mandrels are also there like expansion mandrel, gang mandrel and so on.
Q. Turning a job on mandrel should be with heavy cuts.
A. true
B. false
.
Answer: B
Explanation: This is false. Turning a job on mandrels should be with light cuts.
Q. Which of the following mandrels are most commonly used?
A. plain mandrels
B. stepped mandrels
C. collar mandrels
D. none of the mentioned
.
Answer: A
Explanation: The plain mandrels are most commonly used. It is also known as simple mandrel.
Q. Plain mandrels are used where large number of identical work pieces having standard size holes are required to be mounted.
A. true
B. false
.
Answer: A
Explanation: It can be easily understood from definition of the plain mandrels. In this mandrel, the size of the mandrel is indicated at the flat end portion of the mandrel.
Q. The difference in diameter is_____ mm per 100 mm length in case of the plain mandrels.
A. 1to 2
B. 4 to 5
C. 8 to 10
D. 10 to 12
.
Answer: A
Explanation: The difference in diameter is 1 to 2 mm per 100 mm length in case of the plain mandrels. The taper is provided for proper gripping of the work.
Q. Plain mandrel is suitable for_____ size of bore.
A. only one
B. two
C. more than two
D. none of the mentioned
.
Answer: A
Explanation: Plain mandrel is suitable for only one size of bore. For different sizes of holes in workpieces different diameters of mandrels are used.
Q. In plain mandrels, length varies from_____ mm.
A. 15 to 90
B. 125 to 300
C. 55 to 430
D. 235 to 660
.
Answer: C
Explanation: In plain mandrels, length varies from 55 to 430 mm. The body of this mandrel is slightly tapered.
Q. Which of the following is not true in case of plain mandrel?
A. the body of the mandrel is heavily tapered
B. the taper is provided for proper gripping of the work piece
C. the size of mandrel is indicated at the flat end portion of the mandrel
D. none of the mentioned
.
Answer: A
Explanation: All the mentioned sentences are true except the one which says that the body of mandrel is heavily tapered. Actually, its body is just slightly tapered.
Q. Stepped mandrels are used for turning______
A. collars
B. washers
C. odd sized jobs
D. all of the mentioned
.
Answer: D
Explanation: Stepped mandrels are used for collars, washers, odd sized jobs and so on. The stepped mandrel will have steps of different diameters to accommodate different workpieces.
Q. Which of the following is not true about steeped mandrels?
A. it can have steps of different diameters
B. it can accommodate different work pieces having different sizes of holes
C. removal of mandrel is necessary each time
D. none of the mentioned
.
Answer: C
Explanation: Removal of mandrel is not necessary each time. Sometimes, it can accommodate work piece without removing the mandrel.
Q. In collar mandrel, mandrels are provided with solid collars for turning work pieces having holes of small diameters.
A. true
B. false
.
Answer: B
Explanation: In collar mandrel, mandrels are provided with solid collars for turning work pieces having holes of large diameters.
Q. Collar mandrel fits better than a solid mandrel of equal size.
A. true
B. false
.
Answer: A
Explanation: The construction of collar mandrel reduces its weight considerably and that’s the reason why it fits better than solid mandrel of equal size.
Q. Which of the following mandrel is mostly used for work piece having internal threads?
A. stepped mandrel
B. collar mandrel
C. gang mandrel
D. none of the mentioned
.
Answer: D
Explanation: Answer should be none of the mentioned. Screw mandrel is mostly used for work piece having internal threads.
Q. In screwed mandrel, the threads_____
A. are left handed
B. are right handed
C. may be left or right handed
D. none of the mentioned
.
Answer: C
Explanation: In screwed mandrel, the threads may be left or right handed. Screw mandrels are used for turning the external surfaces of screwed flanges, back plates of chucks etc.
Q. Which of the following is not true for screwed mandrel?
A. the screw mandrel is threaded at one end with a collar
B. the work piece are screwed on to the threaded portion against the collar for machining
C. screw mandrels are used for turning the internal surfaces of screwed flanges, back plates of chucks etc
D. none of the mentioned
.
Answer: D
Explanation: All the mentioned sentences are true except the one which says that screw mandrels are used for turning the internal surfaces of screwed flanges, back plates of chucks etc. Actually, screw mandrels are used for turning the external surfaces of screwed flanges, back plates of chucks etc.
Q. P mandrel consists of a solid one attached to one end and a sliding cone and adjusting nut on the other end. Identify P.
A. plain mandrel
B. stepped mandrel
C. cone mandrel
D. none of the mentioned
.
Answer: C
Explanation: This is the property of cone mandrel. This type of mandrel is suitable for holding workpieces of different diameters.
Q. The cone should be more tightened upon the work piece in cone mandrels.
A. true
B. false
.
Answer: B
Explanation: This is false. The cone should not be tightened too much over the work piece otherwise the outer surface the outer edge may get spoiled.
Q. Which of the following is the part of gang mandrel?
A. fixed collar
B. movable collar
C. nut
D. all of the mentioned
.
Answer: D
Explanation: All of the mentioned are the parts of the gang mandrel. A set of hollow workpieces are mounted on this mandrel and tightened with a nut. The friction between the sides of the work and collar drives the work without any slippage.
Q. In expansion mandrel, how many longitudinal slots are there?
A. 1
B. 2
C. 3
D. 4
.
Answer: C
Explanation: 3 longitudinal slots are there in expansion mandrel. This type of mandrels are very useful in repair workshops where the diameters of workpieces differ frequently from standard sizes.
Q. P mandrel is often provided with adapters or sleeves of different diameters to fit a wide variety of work piece bores. Identify P.
A. gang mandrel
B. expansion mandrel
C. collar mandrel
D. none of the mentioned
.
Answer: B
Explanation: Expansion mandrel is often provided with adapters or sleeves of different diameters to fit a wide variety of work piece bores. The expansion mandrel has a tapered pin driven into a sleeve which is parallel outside and tapered inside.
Q. Expanding mandrels are also available with taper shank.
A. true
B. false
.
Answer: A
Explanation: Expanding mandrels are also available with taper shank to suit the spindle taper of the lathe.
Q. Expanding mandrels can be______ at one end.
A. plane
B. threaded
C. either plane or threaded
D. none of the mentioned
.
Answer: C
Explanation: Expanding mandrels can be plane or threaded at one end. Expansion mandrels are also known as expanding mandrels and this is the property of expansion mandrels.
Q. P is lathe accessory used to give extra support for a long slender work pieces. Identify P.
A. steady rests
B. tool post
C. mandrels
D. none of the mentioned
.
Answer: A
Explanation: Steady rests is lathe accessory used to give extra support for a long slender work pieces in addition to the centre support during turning.
Q. Rests are used when support from_____ end cannot be given for drilling, reaming, tapping etc.
A. headstock
B. tailstock
C. apron
D. none of the mentioned
.
Answer: B
Explanation: Rests are used when support from tailstock end cannot be given for drilling, reaming, tapping etc. These rests are fixed at some intermediate points to prevent bonding of work pieces due to their own weight.
Q. The jaws can be moved readily_____ by means of adjusting screws in fixed steady rest.
A. in
B. out
C. either in or out
D. none of the mentioned
.
Answer: C
Explanation: The jaws can be moved readily in or out by means of adjusting screws. The three jaws are adjusted on a trued cylindrical face of the work piece.
Q. The rest are fixed to prevent the vibration set up due to_____
A. own weight
B. chattering forces
C. own weight and chattering forces both
D. none of the mentioned
.
Answer: B
Explanation: The rest are fixed to prevent the vibration set up due to chattering forces. The use of this rest eliminates the chatter.
Q. Which of the following is not true for rests?
A. rests are used when the length of the work piece is 10 to 15 times the diameters
B. rests help in achieving greater accuracy in machining
C. rests permit only light cuts
D. none of the mentioned
.
Answer: C
Explanation: All mentioned sentences are true except the one which says that the rests are permits only light cuts. Rests permit only heavy cuts.
Q. Which of the following is the type of steady rest?
A. fixed steady rest
B. follower steady rest
C. both fixed steady rest and follower steady rest
D. none of the mentioned
.
Answer: C
Explanation: Both are the types of steady rest. A fixed steady rest is fixed to the lathe bed while follower steady rest consists of a c like frame.
Q. Which of the following are the parts of fixed rest?
A. adjustable pads
B. locking screw
C. bearing pads
D. all of the mentioned
.
Answer: D
Explanation: All above mentioned are the parts of fixed rest. Apart from these, base, bed clamp, hinge etc. are also the parts of fixed steady rest.
Q. Fixed steady rest is stationary.
A. true
B. false
.
Answer: A
Explanation: Fixed steady rest is stationary because it is fixed to the lathe bed.
Q. Fixed steady rest gives support at_____ fixed place only.
A. one
B. two
C. more than two
D. none of the mentioned
.
Answer: A
Explanation: Fixed steady rest gives support at one fixed place only. A fixed steady rest can be clamped at any desired position on the lathe bed.
Q. Fixed steady rest consists of a frame containing_____ adjustable pad.
A. 1
B. 2
C. 3
D. 4
.
Answer: C
Explanation: Fixed steady rest consists of a frame containing three adjustable pads. These pads are also known as jaws.
Q. The top of the frame is machined to suit the inside ways of the
lathe bed in fixed steady rest.
A. true
B. false
.
Answer: B
Explanation: This is false. The base of the frame is machined to suit the inside ways of the lathe bed in fixed steady rest.
Q. Which portion of the bed is hinged at the back in fixed steady rest?
A. top
B. middle
C. bottom
D. none of the mentioned
.
Answer: A
Explanation: The top portion of the bed is hinged at the back to permit the top to be lifted or assembled to the bottom half.
Q. In fixed steady rest, a fixed steady can be clamped_____
A. parallel to lathe bed
B. perpendicular to lathe bed
C. at any desired position on the lathe bed
D. none of the mentioned
.
Answer: C
Explanation: A fixed steady can be clamped at any desired position on the lathe bed. This is done with the help of base clamping screw.
Q. In fixed steady rests, these rests are fixed at some intermediate points to prevent bending of work pieces due to_____
A. own weight
B. chattering forces
C. own weight and chattering forces both
D. none of the mentioned
.
Answer: A
Explanation: These rests are fixed at some intermediate points to prevent bending of work pieces due to their own weight. This rests help in achieving greater accuracy in machining and permit heavier cuts.
Q. Which of the following is not true for fixed steady rest?
A. the three pads or jaws are adjusted on a trued cylindrical face of the work piece
B. a fixed steady can be clamped by the base clamping screw
C. pads are also known as jaws
D. none of the mentioned
.
Answer: D
Explanation: The all above mentioned are true. Jaws can also be termed as pads and also a fixed steady rest can be clamped by base clamping screws.
Q. Which of the following is also known as the travelling steady?
A. fixed steady rest
B. follower steady rest
C. fixed steady rest and follower steady rest both
D. none of the mentioned
.
Answer: B
Explanation: Follower steady rest is also termed as travelling steady. Adjustable screw, bearing pads, frame, lock nut etc. are the main parts of this machine.
Q. Follower steady rest consists of_____ like frame.
A. D
B. C
C. S
D. None of the mentioned
.
Answer: B
Explanation: Follower steady rest consists of ‘C’ like frame. These type of rest is used in finish turning operations or where the entire length of the workpiece is to be turned at a stretch, without disturbing the setting.
Q. How many adjustable pads does follower steady rest has?
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: Follower steady rest has 2 adjustable pads. These pads are helpful for supporting the work.
Q. In follower steady rest, there is a pad which is located_____ the cutting tool.
A. in front of
B. opposite to
C. besides
D. none of the mentioned
.
Answer: B
Explanation: The pad is located opposite to the cutting tool and the other pad bears the top of the workpiece to prevent from spinning up due to the thrust of the load.
Q. In follower steady rest, the work piece is machined slightly wider
than the jaws.
A. true
B. false
.
Answer: A
Explanation: The piece of work is machined slightly wider than jaws to provide bearing surface. For this, the machine surface is brought under the jaws and the tool is set slightly in advanced position than the jaws.
10. Which type feed is provided in follower steady rest?
A. longitudinal
B. cross
C. both cross and longitudinal
D. none of the mentioned
.
Answer: A
Explanation: The tool is fed longitudinally in follower steady rest and the jaws follow the tool giving support where cutting actually take place..
Q. Which of the following is not true for steady follower rest?
A. it is used in finish turning operation
B. it is used where the entire length of the work piece is to be turned at a stretch, without disturbing the setting
C. the support is discontinuous to the entire length of cutting
D. none of the mentioned
.
Answer: D
Explanation: All above sentences are true except the sentence which says that support is discontinuous to the entire length of cutting.The support is continuous to the entire length of cutting.
Q. Which of the following tool material is not suitable for small diameters?
A. carbon steel
B. carbides
C. carbon and carbides both
D. none of the mentioned
.
Answer: B
Explanation: Carbides are not suitable for small diameters as these carbides has higher speeds and generally used in rapid stock removal.
Q. Which of the following cutting material cannot be forged to shape easily?
A. carbides
B. ceramic
C. stellites
D. none of the mentioned
.
Answer: C
Explanation: Stellites cannot be forged to shape easily because they are very brittle in nature.
Q. Which of the following is not the disadvantage of diamonds?
A. incompressible
B. readily conducts heat
C. rigid machine are required
D. all of the mentioned
.
Answer: C
Explanation: For ceramics, we need rigid machines. The other two mentioned disadvantages are true for diamond.
Q. High speed steel has an excessive wear on______
A. castings
B. hard materials
C. casting and hard materials both
D. none of the mentioned
.
Answer: C
Explanation: It has excessive wear on casting and hard materials and that’s why can only perform slow and medium cutting speeds.
Q. Which of the following has poor shock resistant?
A. carbides
B. diamonds
C. ceramics
D. none of the mentioned
.
Answer: C
Explanation: Ceramic has poor shock resistant. Apart from this, it has high wear resistance and again has very high stock removal rate.
Q. In which tool material, rigid machines are required?
A. ceramics
B. carbon steel
C. diamonds
D. all of the mentioned
.
Answer: A
Explanation: Ceramics are used for this purpose. They are not suitable for intermittent cut and even for small diameters.
Q. Machine tools must be tough enough to withstand_____
A. shock
B. vibration
C. both shock and vibration
D. none of the mentioned
.
Answer: C
Explanation: Machine tools must be tough enough to withstand these both in order to provide stability against downward pressure and to perform the job more accurately.
Q. Carbides are used in_____
A. rapid stock removal
B. higher speeds
C. rapid stock removal and higher speed both
D. none of the mentioned
.
Answer: C
Explanation: Carbides are used for these both reasons. But they are not used for comparatively small jobs.
Q. “Light finishing cuts in expensive forming tools”- this quality is applicable to_____
A. carbides
B. ceramics
C. stellites
D. none of the mentioned
.
Answer: D
Explanation: The answer should be none of mentioned. This is the quality of carbon steel.
Q. Which of the following is easy to grind and generally used for intermittent cut?
A. carbides
B. diamond
C. high speed steel
D. none of the mentioned
.
Answer: C
Explanation: High speed steel has some advanced quality and so it is very accurate even on small diameters. So it is easy to grind high speed steel. Again, this high speed steel is generally used for intermittent cut.
Q. “High compressive strength with negative rake” – this is applicable to_____
A. carbides
B. diamonds
C. carbon steel
D. none of the mentioned
.
Answer: A
Explanation: This is the quality of carbides. That’s why they are not suitable for very small diameters.
Q. Which of the following tool material has excessive wear?
A. carbon steel
B. high speed steel
C. carbon steel and high speed steel both
D. none of the mentioned
.
Answer: C
Explanation: These both materials have excessive wear. They have excessive wear on castings and hard materials.
Q. Stellites is good for metal cutting application.
A. true
B. false
.
Answer: B
Explanation: This is false. Stellites is good for non metal cutting application.
Q. Which of the following is not the use of diamond?
A. good for finishing work
B. suitable for cutting hard metals
C. rapid stock removal
D. all of the mentioned
.
Answer: C
Explanation: Diamond is not used for rapid stock removal. For rapid stock removal, carbides and ceramics are used.
Q. For general purpose, which type of cutting tool is used in lathe?
A. single point
B. multi point
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: For general purpose, single point cutting tool is used. Like both shaper and planer are single point cutting tool that only cut in straight line.
Q. For specific purpose, which type of cutting tool is used in lathe?
A. single point
B. multi point
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: For specific purpose, multi point cutting tool is used. Milling and drilling are generally multi point cutting tool.
Q. Ceramics are suitable for intermittent cut.
A. true
B. false
.
Answer: B
Explanation: This is false. Ceramics are not suitable for intermittent cut.
Q. Which of the following is not the type of cutting tool material?
A. carbon steel
B. stellites
C. diamond
D. none of the mentioned
.
Answer: D
Explanation: The answer should be none of the mentioned. All are the types of cutting tool material.
Q. Which of the following is very brittle?
A. stellites
B. diamond
C. both diamond and stellites
D. none of the mentioned
.
Answer: A
Explanation: Stellites are very brittle in nature. They even can’t be forged to shape.
Q. Which of the following can machine the metals effectively?
A. diamonds
B. ceramics
C. both diamonds and ceramics
D. none of the mentioned
.
Answer: C
Explanation: Ceramics can machine hard metals effectively and also has higher compressive strength with negative rake. Diamonds are good for finishing work and also suitable for cutting hard materials.
Q. Lathe cutting tool can be classified according to_____
A. manufacturing of tool
B. method of holding tool
C. method of using tool
D. all of the mentioned
.
Answer: D
Explanation: Cutting tool can be classified according to all mentioned parameters. Generally in lathe we use single point cutting tools.
Q. Which of the following cutting tool can have single roller?
A. boring tool
B. knurling tool
C. both boring tool and knurling tool
D. none of the mentioned
.
Answer: C
Explanation: Both boring tool and knurling tool can have single roller. Generally, boring tool is used to enlarge the hole. Knurling is used when we need a pattern of straight, cross and angular lines cutting each other.
Q. Lathe cutting tool can be classified as right hand and left hand according to_______
A. method of using the tool
B. method of holding the tool
C. method of applying feed
D. none of the mentioned
.
Answer: C
Explanation: Lathe cutting tool can be classified as right hand and left hand according to method of applying feed. Here, feed is the distance the tool advances for each revolution of the work.
Q. Which of the following is not the type of left hand type cutting tool?
A. roughing tool
B. facing tool
C. finishing tool
D. none of the mentioned
.
Answer: D
Explanation: All are the types of left hand cutting tool. Facing, roughing and finishing are one kind of turning operations often carried out on lathe.
Q. According to the method of using the tool, lathe cutting tool can be classified as_______
A. turning
B. grooving
C. forming
D. all of the mentioned
.
Answer: D
Explanation: According to the method of using the tool, lathe cutting tool can be classified as turning, grooving, forming, chamfering, internal thread cutting, parting-off and so on.
Q. Which of the following is not the type of classification as per the method of manufacturing the tool?
A. tipped tool, which is brazed to the carbon steel shank
B. tipped tool, which is fastened mechanically to the carbon steel shank
C. grooving
D. none of the mentioned
.
Answer: C
Explanation: Here, grooving is not the type of classification according to the method of manufacturing the tool. Grooving is the type of classification according to the method of using the tool.
Q. “Tool bit inserted in the (tool) holder and solid tool” – is included in the classification according to the_____
A. method of using tool
B. method of manufacturing tool
C. method of applying feed
D. none of the mentioned
.
Answer: D
Explanation: All options are incorrect. Answer should be none of mentioned. It is suitable with the classification of cutting tool as per the method of holding the tool.
Q. ‘Internal thread cutting’- is suitable with the classification of cutting tool according to the______
A. method of using the tool
B. method of holding the tool
C. method of manufacturing the tool
D. none of the mentioned
.
Answer: A
Explanation: It can be easily seen from the classification of cutting tool. Apart from internal thread cutting, boring, facing, forming etc. are also included in this category.
Q. ‘Round nose’ – is suitable with the classification of cutting tool according to the______
A. method of holding tool
B. method of holding tool
C. method of the applying feed
D. none of the mentioned
.
Answer: C
Explanation: It can be easily understood by looking at the classification of cutting tool. Apart from round nose, right hand tool and left hand tool are also included in this category.
Q. ‘Parting-off’ – is suitable with the classification of cutting tool according to the______
A. method of manufacturing the tool
B. method of holding the tool
C. method of using the tool
D. none of the mentioned
.
Answer: C
Explanation: ‘Parting-off’ – is suitable with the classification of cutting tool according to the method of using the tool. This parting uses a blade like cutting tool into workpiece in order to cut the metal at the speed of spindle.
Q. For lathe operations, work piece can be hold _____
A. between centres
B. on mandrel
C. either between centres or on mandrel
D. none of the mentioned
.
Answer: C
Explanation: Work piece can be hold either between centers or on mandrel. Mandrels are used for holding hollow workpieces for turning concentric to the bore.
Q. Which of the following is used to drive the work piece?
A. carriers
B. catch plates
C. both carriers and catch plates
D. none of the mentioned
.
Answer: C
Explanation: Work piece can be driven by using both of these. Catch plates are either screwed or bolted to the nose of the tailstock spindle while the carriers consists of a cast iron or forged steel body.
Q. Drilling is performed by holding the work by a chuck.
A. true
B. false
.
Answer: A
Explanation: It can be seen from the working of lathe operations. Several types of chucks are there like 4 jaw chuck, 3 jaw chuck and so on.
Q. Knurling can be performed by special attachments.
A. true
B. false
.
Answer: B
Explanation: This is false. Knurling can be done by a chuck on holding work piece between centres.
Q. Grinding can be performed by______
A. using faceplates or angle plates
B. using chucks
C. special attachments
D. none of the mentioned
.
Answer: C
Explanation: Grinding can be done by special attachments. Grinding is a type of machining using an abrasive type of wheel as the cutting tool.
Q. Taper boring and the under boring can be performed by______
A. centers
B. face plates or angle plates
C. special attachments
D. none of the mentioned
.
Answer: B
Explanation: Both types of plates can be used for this purpose. A face plate consists of a circular disk bored out and threaded to sit the nose of the lathe spindle while angel plate is a cast iron plate having two faces machined to make them absolutely at right angles to each other.
Q. Milling can be performed by _____
A. centres
B. face plates or angel plates
C. chucks
D. special attachments
.
Answer: D
Explanation: Milling can be performed by special attachments. Milling machine is a machine tool that removes metal as the work is fed against a rotating multipoint cutter.
Q. Spinning can be done by_____
A. centres
B. face plates or angle plates
C. special attachments
D. none of the mentioned
.
Answer: A
Explanation: This operation can be done by using centres. Spining winding is also done by this method.
Q. Reaming and counter boring can be performed by______
A. centres
B. face plates and angle plates
C. special attachments
D. none of the mentioned
.
Answer: B
Explanation: Both types of operations can be performed by using plates. Apart from that, parting off, internal thread cutting, undercutting are also performed by this method.
Q. Eccentric turning can be performed by using special attachments.
A. true
B. false
.
Answer: B
Explanation: This is false. Eccentric type of turning can be performed by using centres or chucks.
Q. A taper may be defined as a uniform gradual_____ along the length of the job.
A. increase
B. decrease
C. increase or decrease
D. none of the mentioned
.
Answer: C
Explanation: A taper may be defined as a uniform gradual increase or decrease along the length of the job. Taper turning can be measured by from tool method, tailstock offset method, compound slide method and so on.
Q. The taper is measured in terms of radius along the length of the job.
A. true
B. false
.
Answer: B
Explanation: This is false. The taper is measured in terms of diameter along the length of job.
Q. In a lathe, taper turning means to produce a_____ surface by gradually decreasing the value of diameter from a cylindrical work piece.
A. conical surface
B. flat surface
C. both conical and flat surface
D. none of the mentioned
.
Answer: A
Explanation: Taper turning means to produce a conical surface by gradually decreasing the value of diameter from a cylindrical work piece lathe. Two types of tapers are there: internal and external taper.
Q. Which of the following is not true for taper turning?
A. taper turning is one type of lathe operation
B. the amount of taper is specified by the ratio of its length to the difference in the diameter of the taper
C. amount of taper is designated by the letter K
D. none of the mentioned
.
Answer: B
Explanation: All the sentences are true except the sentence which says that the amount of taper is specified by the ratio of its length to the difference in the diameter of the taper. The amount of taper is specified by the ratio of difference in the diameters of the taper to its length.
Q. Amount of taper in a work piece is termed as conicity.
A. true
B. false
.
Answer: A
Explanation: It can be easily understood by the definition of taper. For taper or conicity feed is provided. Two types of feeds are there: manual feed and power feed.
Q. The SI unit of taper is_____
A. meter
B. centimeter
C. millimeter
D. none of the mentioned
.
Answer: D
Explanation: Taper is ratio of same quantity. It is unitless.
Q. Full taper angle is also known as angle of taper.
A. true
B. false
.
Answer: B
Explanation: This is false. Half taper angle is also known as angle of taper.
Q. Which of the following is the right formula for taper?
A. K= (D-D. / L
B. K= L / (D-D.
C. K= D/ L
D. none of the mentioned
.
Answer: A
Explanation: K= (D-D. / L – It is the basic formula used for calculating taper. Here k=taper, D and d are diameters and l is length.
Q. Find the value of K. D= 90 mm, d=80 mm, L=1cm.
A. 1
B. 10
C. 100
D. none of the mentioned
.
Answer: A
Explanation: 1 cm = 10 mm. From the formula K= (D-D./L, K can be easily calculated.
Q. Find the value of d. K=1/10, L= 10 cm, D=65 mm.
A. 45 mm
B. 55 cm
C. 75 mm
D. none of the mentioned
.
Answer: D
Explanation: Answer should be 55 mm. It can be easily calculated from the formula K= (D-D./L.
Q. Which of the following is not the method of taper turning?
A. compound rest method
B. tailstock offset method
C. attachment method
D. none of the mentioned
.
Answer: D
Explanation: All are methods of taper turning.By using compound rest method and and attachment method, both internal and external taper can be turned while tailstock offset method is used only for external tapers.
Q. From tool method is used where accuracy is the major criterion.
A. true
B. false
.
Answer: B
Explanation: This is false. From tool method is used when accuracy is not the major criterion.The form tool should be set at right angels to the axis of the work.
Q. From tool method is generally used for_____ production for producing_____ length of taper.
A. mass, small
B. mass, long
C. little, small
D. little, long
.
Answer: A
Explanation: This method is used for mass production for producing small length of taper.
Q. Tailstock method is highly suitable for producing steep tapers.
A. true
B. false
.
Answer: B
Explanation: This is false. Tailstock method is not suitable for producing steep tapers.
Q. Attachment method can produce only small taper.
A. true
B. false
.
Answer: B
Explanation: This is false. Lengthy taper can be produced by this method.
Q. In compound slide method, which of the following is swiveled?
A. top slide
B. swivel base
C. apron
D. none of the mentioned
.
Answer: A
Explanation: Top slide is swiveled in this method. It is swiveled to half the included angel of the taper.
Q. In compound slide method, one part of compound rest is swiveled to_____ the included angle of the taper.
A. the same as
B. half
C. double
D. none of the mentioned
.
Answer: B
Explanation: In compound slide method, one part of compound rest is swiveled (at half the included angle of the taper). We can easily set this compound slide.
Q. In compound rest method, the amount of taper for setting the angle is calculated from this formula, tan of angle of taper =_____
A. (D-D. / L
B. (D-D. / 2L
C. (D-D. / 4L
D. none of the mentioned
.
Answer: B
Explanation: (D-D. / 4L – this is the formula for the tan of the angel of taper. Taper is the shape in which the diameter of the both ends are different.
Q. Which type of tapers can be produced by using compound rest method?
A. internal
B. external
C. both internal and external
D. none of the mentioned
.
Answer: C
Explanation: Both internal and external taper can be produced by using compound slide method. But there is one disadvantage. We can only give hand feed so we can’t expect a high accurate and mass work.
Q. Which of the following is not true for compound slide method?
A. threads, which are there on taper portion cannot be produced
B. steep taper cannot be produced
C. taper length is limited to the movement of the top slide
D. none of the mentioned
.
Answer: B
Explanation: All mentioned sentences are true except the sentence which says that steep taper can’t produced by this method. Steep taper can be produced by this method.
Q. In attachment method, the bar having graduations in degree is set at the_____ with the lathe axis.
A. 0 degree
B. 90 degree
C. any desired angle
D. 180 degree
.
Answer: C
Explanation: The bar is set at any desired angle with the lathe axis. The principle of turning taper by attachment is to guide the tool in a straight path set an angel to the axis of rotation of the work piece, while the work is being revolved between centers or by a chuck aligned to the lathe axis.
Q. In compound slide method, taper length is limited to the movement of_____
A. apron
B. swivel base
C. top slide
D. none of the mentioned
.
Answer: C
Explanation: Taper length is limited to the movement of top slide in this method. Along with this, easily setting of the compound slide can be done easily.
Q. The taper can be turned up to maximum setting angle of_____ for both outside and inside tapers with taper attachment and automatic feed.
A. 5 to 6 degree
B. 1 to 2 degree
C. 10 to 12 degree
D. none of the mentioned
.
Answer: C
Explanation: The taper can be turned up to maximum setting angle of 10 to 12 degree for both outside and inside tapers with taper attachment and automatic feed.
Q. Attachment method is most suitable for producing duplicate tapers.
A. true
B. false
.
Answer: A
Explanation: Attachment method is most suitable for producing duplicate tapers because the change in length of job does not affect the taper.
Q. Which of the following is not true for attachment method?
A. lengthy tapers can be produced
B. the alignment of the lathe center is disturbed
C. power feed can be given
D. none of the mentioned
.
Answer: B
Explanation: All the sentences are true except the sentence which says that the alignment of the lathe center is disturbed. The alignment of the lathe center is not disturbed in attachment method.
Q. In tailstock offset method, the job is held at an angle and the tool moves______ to the axis.
A. parallel
B. perpendicular
C. at 45 degree
D. none of the mentioned
.
Answer: A
Explanation: The tool moves parallel to the axis in this method. the body of the tailstock is shifted on its base to an amount corresponding to the angle of taper.
Q. In tailstock method, the angle at which the axis of rotation of the job is shifted is equal to______ the angle of taper.
A. half
B. double
C. triple
D. none of the mentioned
.
Answer: A
Explanation: This is angle is equal to half the angle of taper. This taper can be turned between centers only.
Q. In tailstock method, body of the tailstock is made to slide on its base_____ from the operation.
A. towards
B. away
C. either towards or away
D. none of the mentioned
.
Answer: C
Explanation: In tailstock method, body of the tailstock is made to slide on its base either away or towards from the operation. This operation is done with the help of setover screw.
Q. The form tool should be set parallel to the axis of the work.
A. true
B. false
.
Answer: B
Explanation: This is false. The form tool should be at right angle to the axis of the work.
Q. Which type of taper is generally turned in tailstock method?
A. internal
B. external
C. both internal and external
D. none of the mentioned
.
Answer: B
Explanation: Only external taper can be turned in this method. Generally for internal threads this method is not used.
Q. Which of the following is not true for tailstock method?
A. the body of tailstock is shifted on its base to an amount corresponding to the angle of taper
B. the movement of tailstock is made by a setover screw
C. accurate setting of the offset is easy
D. none of the mentioned
.
Answer: C
Explanation: All the mentioned sentences are true except one which says that accurate setting of the offset is easy. Actually, accurate setting of the offset is difficult in this method.
Q. Which of the following is not true for tailstock method?
A. the taper can be turned between centres only
B. duplicate tapers can be produced
C. the alignment of the lathe centres will be disturbed
D. none of the mentioned
.
Answer: D
Explanation: All the above sentences are true. These all sentences are related with tailstock method in which the maximum length of the taper can be produced.
Q. Which of the following is the benefit of tailstock method?
A. power feed can be given
B. good surface finish can be obtained
C. maximum length of the taper can be produced
D. all of the mentioned
.
Answer: D
Explanation: These all are the benefits of the tailstock method. Apart from these benefits, we have some other benefits too like external threads on taper portion can be produced, duplicate tapers can be produced and so on.
Q. Tailstock method damage the centre drilled holes of the work.
A. true
B. false
.
Answer: A
Explanation: This is the disadvantage of this method. Apart from it, it has other big disadvantage that only external taper can be produced.
Q. The taper turning attachment consists essentially of a frame which is attached to the_____ end of the lathe bed.
A. front
B. rear
C. both front and rear
D. none of the mentioned
.
Answer: B
Explanation: The taper turning attachment consists essentially of a frame which is attached to the rear end of the lathe bed. This attachment is provided only on a few modern lathes.
Q. Only hand feed is possible in compound slide method.
A. true
B. false
.
Answer: A
Explanation: This is the biggest disadvantage of this method. Also, threads on taper portion cannot be produced.
Q. In attachment method, cross-slide must be made_____ the lead screw.
A. fixed with
B. free from
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: Cross slide must be made free from the lead screw in this method. The tool mounted on the cross-slide will follow the angular path.
Q. Which type of tapers can be produced by attachment method?
A. internal
B. external
C. both internal and external
D. none of the mentioned
.
Answer: C
Explanation: Both types of tapers can be produced by attachment method. Apart from this, good surface finish is also obtained as well as the alignment of the lathe centers is not disturbed.
Q. In attachment method, the angle of swiveling the guide bar can be determined from this equation, tan of angle =______
A. (D-D. / L
B. (D-D. / 2L
C. (D-D. / 4L
D. none of the mentioned
.
Answer: B
Explanation: Here, D and d denotes diameters and L denotes length. The tan of angel is also known as the angel of swiveling the guide bar.
Q. By attachment method, large number of taper angle can be turned.
A. true
B. false
.
Answer: B
Explanation: This is false. Only limited taper angle can be turned by this method.
Q. The threading tool is clamped in the tool post on the compound slide.
A. true
B. false
.
Answer: A
Explanation: It can be easily understood by looking at the definition of the threading. The tool post holds the tool or tools meant for the operation to be performed on the work.
Q. The lead screw obtains_____ motion from the working spindle.
A. rotary
B. transmitting
C. both rotary and transmitting
D. none of the mentioned
.
Answer: A
Explanation: The lead screw obtains rotary motion from the working spindle. The lead screw drives the tool post axially against the workpiece to produce a helical groove.
Q. The _____ motion is converted into_____ motion of the tool slide
in thread cutting.
A. rotary, feed
B. feed, rotary
C. transmitting, longitudinal
D. none of the mentioned
.
Answer: A
Explanation: The rotary motion is converted into feed motion. The ledscrew has a trapezoidal thread and obtains this rotary motion which converts into feed motion by split.
Q. The split is mounted in the_____ of the carriage.
A. saddle
B. apron
C. top slide
D. cross slide
.
Answer: B
Explanation: It can be easily seen from the construction of the carriage. The apron is fastened to the saddle and hangs over the front of the bed.
Q. In thread cutting, which type of feed motion is possible?
A. engaging
B. disengaging
C. either engaging or disengaging
D. none of the mentioned
.
Answer: C
Explanation: Both types of feed motion is possible in thread cutting. In order to perform these feed motions split nut’s movement is required.
6. In thread cutting, the _____ feeds should be equal to the pitch of the thread, which is to be cut per revolution of the work piece.
A. cross feed
B. longitudinal feed
C. angular feed
D. none of the mentioned
.
Answer: B
Explanation: This is the definition of the longitudinal feeds. Again here the feed is the distance the tool advances for each revolution of work.
Q. In thread cutting, which of the following receives traversing motion from the lead screw of the lathe?
A. apron
B. top slide
C. cross slide
D. none of the mentioned
.
Answer: D
Explanation: Saddle receives traversing motion from the lead screw of the lathe, This leadscrew has a definite pitch.
Q. In thread cutting, definite ratio is calculated between the_____ feed and rotation of the_____ spindle.
A. longitudinal, headstock
B. cross, headstock
C. cross, tailstock
D. longitudinal, tailstock
.
Answer: A
Explanation: The definite ratio is calculated between the longitudinal type of feed and the rotation of the headstock spindle. This ratio should be found out so that the relative speeds of rotation of the work and the leadscrew will result in the cutting of a screw of the desired pitch.
Q. Which of the following is not true for thread cutting?
A. tool post is driven by lead screw axially against the work piece
B. the lead screw has a trapezoidal thread
C. the relative type of speeds of rotation of the work and the lead screw can result in the cutting of a screw of the desired pitch
D. none of the mentioned
.
Answer: D
Explanation: All the sentences are true. These all mentioned sentences are the related with the working of the thread cutting which can be carried on a lathe to obtain standard forms and properties of screw threads by using appropriate tools.
10. In thread chasing dial, the half nut is_____ when any live on the dial coincides with a reference live already set.
A. opened
B. closed
C. partially opened and partially closed
D. none of the mentioned
.
Answer: B
Explanation: At this condition, the half nut is closed to avoid collision. Thread chasing dial is a special attachment used in cutting threads.
Q. In thread chasing dial, half nut is closed when any numbered live coincides with reference live for_____ thread.
A. even
B. odd
C. can’t say anything
D. none of the mentioned
.
Answer: B
Explanation: In thread chasing dial, half nut is closed when any numbered live coincides with reference live for odd thread. The dial indicates when to close the split nut.
Q. The chasing dial is mounted on the right end of the _____
A. tool post
B. apron
C. head stock
D. none of the mentioned
.
Answer: B
Explanation: The chasing dial is mounted on the right end of the apron. This chasing dial is generally used to pick up the thread.
Q. In chasing dial, dial rotate as long as the half nut is_____
A. engaged
B. not engaged
C. either engaged or not engaged
D. none of the mentioned
.
Answer: B
Explanation: In chasing dial, dial rotate as long as the half nut is not engaged. Dial stops when the half nut is engaged.
14. An odd thread is one, whose pitch is an exact multiple of the pitch of the lead screw.
A. true
B. false
.
Answer: B
Explanation: This is false. An even thread is one, whose pitch is an exact multiple of the pitch of the lead screw.
Q. For feed motion, split nut has to be_____
A. always closed
B. always opened
C. either opened or closed (depend upon motion)
D. none of the mentioned
.
Answer: C
Explanation: Split nut may be open or close depends upon the situations. This is done in order to engage or disengage the feed motion.
Q. In simple gear, the intermediate gear has no effect on the ratio between the driver and the driven.
A. true
B. false
.
Answer: A
Explanation: This is true. The intermediate gear has no effect on the ratio between the driver and the driven, but merely acts as a connection between the two and serves to keep the rotation of the driver and driven in the same direction.
Q. The gear connections on a lathe______
A. always compound
B. always simple
C. may be simple or compound
D. none of the mentioned
.
Answer: C
Explanation: The gear connection on a lathe may be simple or compound depends upon the requirement. It is versatile.
Q. The gear on the stud shaft acts as a _____
A. driver
B. driven
C. can’t say anything
D. none of the mentioned
.
Answer: A
Explanation: The gear on the stud shaft act as a driver. It can be considered as spindle gear as usually it runs at the same spindle speed.
4. Which of the following is also known as Norton gearbox?
A. simple gear train
B. compound gear train
C. quick change type of gearbox
D. none of the mentioned
.
Answer: C
Explanation: Quick change type of gearbox is also known as Norton gearbox. It covers all the ratio of screw cutting and feed rate likely to be wanted.
Q. In Norton gearbox, gear changing is effected by the movement of_____ levers.
A. one
B. two
C. three
D. four
.
Answer: B
Explanation: Gear changing is affected by the movements of two levers as well as a sliding gear. This eliminates the need to remove and change the gears as in the standard change gearbox.
Q. Teeth on driven gear / teeth on driver gear =_______ T.P.I on lead screw=a, T.P.I. on work piece=b.
A. a/b
B. b/a
C. a*b
D. none of the mentioned
.
Answer: B
Explanation: (b/A. – This is the suitable ratio for threads where T.P.I on lead screw=a, T.P.I. on work piece=b. If the units of workpiece and leadscrew threads are different, in that case the gears are calculated as follows: 1 inch = 2Q.4 mm.
Q. Driver gear/driven gear =______ pitch of work piece threads=a, pitch of lead screw =b.
A. a/b
B. b/a
C. a*b
D. none of the mentioned
.
Answer: A
Explanation: It is the suitable ratio. In British it will be equal to (a/B.*(5/127).
Q. Lead screw pitch=6mm, work piece pitch=1mm. Find change gears.
A. 6
B. 1/6
C. 3
D. none of the mentioned
.
Answer: B
Explanation: Change gear=work piece pitch/lead screw pitch. From this formula, we can easily get 1/6 as a answer.
Q. Change gear=2, lead screw pitch = Q. Find work piece pitch.
A. 4
B. 16
C. 2
D. none of the mentioned
.
Answer: B
Explanation: Change gear=work piece pitch/lead screw pitch. So, work piece pitch = change gear*lead screw pitch
= 2*8
= 16
Q. In a compound train, the stud carriers______ gears.
A. 1
B. 2
C. 3
D. 4
.
Answer: B
Explanation: The stud carriers two gears. The gear on the stud shaft act as a driver.
Q. ______ is the speed at which the metal is removed by the tool from the work piece.
A. feed
B. cutting speed
C. depth of cut
D. none of the mentioned
.
Answer: B
Explanation: It can be easily understood by looking at the definition of the cutting speed. Cutting speed is a peripheral speed of the work.
Q. Which of the following represents the formula for cutting speed? cs =cutting speed, D= diameter of work, N= rpm.
A. cs = (Q.14*D*N)
B. cs = (D*N)
C. cs = (Q.14*D./N
D. none of the mentioned
.
Answer: A
Explanation: Cs = (Q.14*D*N) – This is the formula for finding the cutting speed.
Q. Which of the following represent the unit of cutting speed?
A. meter*minute
B. meter*meter*minute
C. meter / minute
D. none of the mentioned
.
Answer: C
Explanation: In cutting speed’s formula, d-diameter expressed in meter and n is rpm – revolution per minute. By putting this units in cutting speed’s formula, we can easily obtain its unit as meter/minute.
Q. _____ is the distance the tool advances for each revolution of the work.
A. feed
B. depth of cut
C. metal removal rate
D. none of the mentioned
.
Answer: A
Explanation: The feed of a cutting tool in a lathe work is the distance the tool advances for each revolution of the work. Increased feed reduces the cutting time.
Q. Which of the following is the unit of the feed?
A. mm / minute
B. mm / revolution
C. mm * minute
D. none of the mentioned
.
Answer: B
Explanation: Mm / revolution is the right unit for feed. In British system it is expressed in inches per revolution.
Q. The depth of cut is the_____ distance measured from the machined surface to the surface of the work piece, which is uncut.
A. parallel
B. perpendicular
C. at 45 degree
D. none of the mentioned
.
Answer: B
Explanation: It is the perpendicular distance measured from the machined surface to the surface of the work piece, which is uncut. Other factors remaining constant, the depth of cut varies inversely as the cutting speed.
Q. Which of the following represents the formula for the depth of cut? d1=diameter of work surface before machining and d2=diameter of the machined surface
A. d1+d2
B. d1-d2
C. (d1+d2)/2
D. (d1-d2)/2
.
Answer: D
Explanation: (D1-d2) – this is the formula for depth of cut. Here both d1 and d2 are diameters and expressed in mm.
Q. Which of the following represents the formula for metal removal rate?
a=cutting speed, b=depth of cut, c=feed, d=revolution
A. (a*b*D./c
B. (a*B./(c*D.
C. (a*b*C./d
D. none of the mentioned
.
Answer: C
Explanation: (a*b*C./d – This is the right formula for metal removal rate. Here a is expressed in mm/minute, b is expressed in mm, c is expressed in mm/revolution and d is simply revolution.
Q. Which of the following represents the unit of metal removal rate?
A. mm/revolution
B. mm*mm/revolution
C. mm*mm*mm/revolution
D. none of the mentioned
.
Answer: C
Explanation: Mm*mm*mm / revolution is the right unit for the metal removal rate. If we put the units of cutting speed, depth of cut and feed in formula we can easily get this result.
Q. Which of the following represents the unit for machining time?
A. mm / minute
B. minute / revolution
C. minute
D. none of the mentioned
.
Answer: C
Explanation: Machining time is simply a time so its unit must be matched with time’s unit. Minute is the right unit for machining time.
Q. Which of the following represents the formula for the machining time? s=feed of the job per revolution, l=length of the job, n=rpm.
A. l / (s*n)
B. (s*n) / l
C. (l*s) / n
D. none of the mentioned
.
Answer: A
Explanation: Length of the job / (feed of the job per revolution*rpm) is the right for machining time. Also we can cross check the formula. Put the unit of each quantity and check in which formula we can get unit as a time’s unit.
Q. For general purposes, ratio of the depth of cut to the feed varies from_____
A. 10:1
B. 1:10
C. 100:1
D. 1:100
.
Answer: A
Explanation: The ratio varies from 10:Q. The depth of cut varies inversely as the cutting speed.
Q. Which of the following is included in basic machine tools?
A. lathe machine
B. production milling machine
C. production drilling machine
D. none of the mentioned
.
Answer: A
Explanation: According to the definition of basic type of machine tools, lathe is basic machine tool while production milling machine and production drilling machines are special purpose drilling machines.
Q. Which type of machine tool is used for mass production of essentially small parts?
A. general purpose
B. special purpose
C. automatic screw cutting
D. none of the mentioned
.
Answer: C
Explanation: The automatic type of screw cutting is used for this purpose. The automatic screw cutting is used because of its high accuracy.
Q. Which of the following does all the work of lathe machine?
A. turning centre of CNC type
B. machining centre of CNC type
C. turning centre of CNC type and machining centre of CNC type both
D. none of the mentioned
.
Answer: A
Explanation: This type of turning centre does most of jobs of lathe. Lathe is a basic machine used for producing cylindrical machine. It is considered as father of machine tool.
Q. CNC machining centre does all the work_____
A. milling machine
B. drilling machine
C. both milling and drilling machine
D. none of the mentioned
.
Answer: C
Explanation: CNC machining centre perform almost all jobs of milling and drilling machines. Drilling machine is used to produce holes and milling machines remove metal as the work is fed against a rotating multipoint cutter.
Q. Which of the following is the type of lathe machine?
A. capstan
B. turret
C. both capstan and turret
D. none of the mentioned
.
Answer: C
Explanation: These both are categorized under the types of lathe machine. Turret and capstan lathe are generally used for the production of duplicate parts
Q. The development of machine tools (which are used for metal cutting) started from the invention of cylinder.
A. true
B. false
.
Answer: A
Explanation: According to the history of machine tools, Egyptians were the first, who used that. They used the cylinder.
Q. DNC stands for_____
A. digital numerical control
B. direct numerical control
C. double numerical control
D. none of the mentioned
.
Answer: B
Explanation: DNC is the abstract form of direct numerical control.
Q. Machine tools are economical for producing large rots.
A. true
B. false
.
Answer: B
Explanation: This is false. Machine tools are only economical, when it is used for producing small number of pieces.
Q. The capacity and the efficiency of the universal machine tools are high.
A. true
B. false
Answer: B
Explanation: This is false. It is comparatively low in case of universal machine tool.
10. Machine tools can be classified as _____
A. geometric shape of the work piece
B. number of the work piece
C. function of the machine
D. all of the mentioned
Answer: D
Explanation: These all are the aspects, which are responsible for the classification. In machine tools, lathe is the most important machine tool followed by drilling machine and shaper machine.
Q. Revolver machine tool is an example of special purpose machine tool.
A. true
B. false
.
Answer: A
Explanation: This is false. Revolver machine tool is an example of production machine tool.
Q. The demand of instruments or parts, which are used for
purpose of measurements are more in NC machine tool.
A. true
B. false
.
Answer: B
Explanation: This is false. The demand are less in case of NC machine tool.
