MCQ’s On Lathe Machine
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.
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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.
1Q. 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.
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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.
1Q. 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.
1Q. 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.
1Q. 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.
1Q. 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.
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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.