MCQ’s On Shaper Machine
Q.In shaper, the tool head consists of_______
A. tool post
B. tool slide
C. clamper box
D. all of the mentioned
.
.Answer: D
Explanation: All mentioned are the parts of tool head. Toolhead of a shaper holds the tool rigidly and provides vertical and angular feed movement.
Q.The main parts of shaper are _______
A. base and body
B. ram and tool head
C. crossrail and body
D. all of the mentioned
.
.Answer: D
Explanation: All mentioned are the parts of shaper. Due to these parts, this machine is arranged in such a manner that it can produce flat surfaces easily and perform other operations too.
Q. The body of the shaper comprises of ________
A. pillar
B. column
C. frame
D. all of the mentioned
.
.Answer: D
Explanation: All are the parts of shaper. Column and pillar are used to stabilize the machine and are mounted on base. The frame is the basic structure of this machine.
Q. The base of the shaper is a heavy cast iron casting.
A. true
B. false
.
.Answer: A
Explanation: As per the construction of the base. It must be made of heavy cast iron casting because the whole machine including pillar, frame, column are mounted on the base. So base must be capable and strong enough to withstand it.
Q. Which of the following part of shaper supports the entire load of the machine?
A. base
B. crossrail
C. frame
D. none of the mentioned
.
.Answer: A
Explanation: Base of shaper supports the entire load of the machine. All other parts are mounted on the base. It is the basic foundation of this machine.
Q.The base of the shaper is not able to withstand the vibration.
A. true
B. false
.
..Answer: B
Explanation: The base of shaper is able to withstand the vibration. In shaper, reciprocating feed is given so there is always a chance of higher vibration and since the entire machine is mounted on the base it is necessary that this base must be able to withstand vibration for the safety purpose.
Q. Drive mechanism consists of ________
A. main drives
B. the gear box
C. quick return mechanism
D. all of the mentioned
.
.Answer: D
Explanation: All are the parts of drive mechanism. Shapers may have drive mechanism or hydraulic mechanism.
Q. Quick return mechanism is responsible for ram movement.
A. true
B. false
.
.Answer: A
Explanation: As per the working of quick return mechanism. Whenever there is a need to convert rotary motion into reciprocating motion, quick return mechanism is used.
Q.The top of the body provides guideways for______
A. ram
B. crossrail
C. can’t say anything
D. none of the mentioned
.
.Answer: A
Explanation: As per the construction and working of shaper body. Guideways are like a track or path and ram is a reciprocating member of shaper.
Q. Saddle slides along the ram.
A. true
B. false
.
..Answer: B
Explanation: This is false. Saddle slides along the crossrail which holds the table firmly on its top.
Q. The front of the body provides guideways for _______
A. ram
B. crossrail
C. can’t say anything
D. none of the mentioned
.
..Answer: B
Explanation: The front of the body provides guideways for crossrail . Crossrail has two parallel guideways on its top in the vertical plane.
Q. The crossrail is mounted on the______ of the body frame
A. front
B. back
C. can’t say anything
D. none of the mentioned
.
.Answer: A
Explanation: The crossrail is mounted on the front of the body frame. Crossrail can slide up and down in the vertical frame.
Q. The ram can be moved up and down.
A. true
B. false
.
.Answer: A
Explanation: These both movements are possible in the ram. It houses a screwed shaft for altering the position of ram.
Q. The _______ movements of crossrail permit the jobs of different heights to be accommodated below the tool.
A. horizontal
B. vertical
C. can’t say anything
D. none of the mentioned
.
..Answer: B
Explanation: The vertical movements of crossrail permit the jobs of different heights to be accommodated below the tool. The table may be raised or lowered to accommodate different sizes of job by rotating an elevating screw which causes the crossrail to slide up and down.
Q. Saddle carries the work table.
A. true
B. false
.
.Answer: A
Explanation: This is true. It carries the table which can be raised or lowered to accommodate different sizes.
Q. Which movement of ram is called stroke?
A. only back
B. only forth
C. back and forth
D. none of the mentioned
.
.Answer: C
Explanation: Back and forth movement of ram is called stroke, but only in forward stroke useful work is done.
Q. The stroke can be adjusted according to the length of the workpiece to be machined.
A. true
B. false
.
.Answer: A
Explanation: This is true. Two strokes are there: forward stroke and return stroke. Time for forward stroke should be more than return stroke for better performance.
Q.The ram is driven back and forth in its slides by crank slider mechanism.
A. true
B. false
.
..Answer: B
Explanation: This is false. The ram is driven back and forth in its slides by slotted link mechanism.
Q. Shaper can produce contours of ______
A. concave
B. convex
C. both concave and convex
D. none of the mentioned
.
.Answer: C
Explanation: Shaper can produce contours of both concave and convex. There are some contour type shapers which are fixed by an additional mechanism known as tracer mechanism.
Q. Shaper can produce flat surface only in horizontal and vertical plane, not in angular plane.
A. true
B. false
.
..Answer: B
Explanation: This is false. Shaper can produce flat surface in all horizontal ,vertical and angular planes. This is the main purpose shaper. It is primarily intended for the purpose of producing flat surfaces.
Q. According to the type of mechanism used for giving reciprocating motion to the ram, shaper can be classified as______
A. crank type
B. geared type
C. both crank type and geared type
D. none of the mentioned
.
.Answer: C
Explanation: According to the type of mechanism used for giving reciprocating motion to the ram, shaper can be classified as both crank type and geared type. Here the ram means the reciprocating member of the shaper which houses a screwed shaft.
Q.According to the type of design of the table, lathe can be classified as_____
A. standard shaper
B. universal shape
C. both standard shaper and universal shaper
D. none of the mentioned
.
.Answer: C
Explanation: According to the type of design of the table, lathe can be classified as both standar shaper and universal shaper. Standard shaper is also known as plain shaper which has only two movements vertical and horizontal to get feed.
Q. Push type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
.Answer: C
Explanation: Push type shaper is type of shaper according to type of cutting stroke. In push type shaper, at the time when the ram is moving away/going away from the column, removal of metal is done.
Q.horizontal type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
..Answer: B
Explanation: horizontal type shaper is type of shaper according to position and travel of the ram. When we talk about horizontal shaper, it is mostly used for producing flat surfaces.
Q. Draw type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
.Answer: C
Explanation: Draw type shaper is type of shaper according to, type of cutting stroke. In this type of shaper, at the time when the ram is moving towards in the direction of column, the metal removal is done.
Q.Travelling head type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
..Answer: B
Explanation: Travelling head type shaper is type of shaper according to, position and travel of the ram. In workshop, if we have a machine that cannot be fixed on the machine or can not be moved at that time we use this shaper.
Q. Hydraulic type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
.Answer: D
Explanation: As per the classification of this machine, it can be classified according to the type of mechanism used for giving reciprocal motion to the ram. In hydraulic shaper, not a penny sound is produced. So this shaper machine can be termed as eco friendly machine to some extent.
Q. In crank type shaper, for performing an operation a multi point cutting tool is employeed.
A. true
B. false
.
.Answer: A
Explanation: This is false. In crank type shaper, for performing an operation a SINGLE point cutting tool is employed. The crank mechanism is used in order to drive reciprocating ram.
Q.Vertical type shaper is type of shaper according to______
A. design of the table
B. position and travel of the ram
C. type of cutting stroke
D. none of the mentioned
.
..Answer: B
Explanation: Vertical type shaper is type of shaper according to position and travel of the ram. In vertical type shaper ram has its motion in vertical direction, that’s why it is known as vertical shaper.
Q. The shaper is a reciprocating type of machine tool primarily intended for producing flat surfaces.
A. true
B. false
.
.Answer: A
Explanation: As per the definition of this machine. It is a reciprocating type machine introduced by James Nasmyth in 1836 for producing flat surfaces.
. Standard shaper is also known as plain shaper.
A. true
B. false
.
.Answer: A
Explanation: As per the definition of standard shaper. This shaper uses a linear tool path for machining.
Q.A shaper is termed as standard when the table has _____ movements.
A. only one
B. only two
C. only three
D. none of the mentioned
.
..Answer: B
Explanation: This is the definition of standard shaper. Other types of shaper are horizontal shaper, draw-cut shaper, universal shaper etc.
Q.Which type of movements of table can be given to the feed?
A. horizontal
B. vertical
C. horizontal or vertical
D. none of the mentioned
.
.Answer: C
Explanation: Both horizontal and vertical table movements can be given to feed. Linear relative motion between a work piece and single point cutting tool is given.
Q.The table must be supported at the outer end.
A. true
B. false
.
..Answer: B
Explanation: It is not compulsory that the must be supported at the outer end. It may or may not be supported at outer end.
Q. The base of standard is made of cast iron.
A. true
B. false
.
Q. The base of the standard shaper is able to_____
A. resist vibration
B. take up high compressive
C. both resist vibration and take up high compressive
D. none of the mentioned
.
.Answer: C
Explanation: This is the property of standard shaper’s base. As it is made of cast iron and other strong component it has these properties.
Q.The base may be rigidly bolted to the floor of the shop or on the bench according to the size of the machine.
A. true
B. false
.
.Answer: A
Explanation: As per the construction of standard shaper. This type of arrangement of base provide great stability to machine and make the machine more suitable for its purpose.
Q. Which of the following is a box like casting mounted up on the base.
A. column
B. crossrail
C. toolhead
D. none of the mentioned
.
.Answer: A
Explanation: Column is situated on the base so we can feel that it is a box like casting mounted up on the base because of its arrangement.
Q. Which of the following encloses the ram drive mechanism?
A. crossrail
B. toolhead
C. saddle
D. none of the mentioned
.
.Answer: D
Explanation: Column encloses the ram drive mechanism. This ram can be adjusted for stroke. It can move faster in return stroke due to its geometry.
Q. The ram reciprocates on the top of the column.
A. true
B. false
.
.Answer: A
Explanation: This is true. In ram movement, due to slotted link, ram move faster in case of return stroke as compare to forward stroke..
1Q.How many machined guideways are provided on the top of the column?
A. one
B. two
C. four
D. none of the mentioned
.
..Answer: B
Explanation: Two guideways are provided. Guideways are like a tracko or path along with simething move.
1Q.The _____ face of the column serves as the guideways for the crossrail.
A. front horizontal
B. back horizontal
C. front vertical
D. back vertical
.
.Answer: C
Explanation: Front vertical face serves as the guideways for the crossrail.
1Q.The ram is reciprocating member of the shaper.
A. true
B. false
.
.Answer: A
Explanation: It is the property of ram. Its speed is high in case of return stroke and low in forward stroke.
1Q.Which type of feed movements of tool does the toolhead provide?
A. vertical
B. angular
C. both vertical and angular
D. none of the mentioned
.
.Answer: C
Explanation: Toolhead provides these both feed movements of tool. Shaper toolhead is made of the clapper box, clapper block, toolpost and hinge pin.
1Q.The toolhead allows the tool to have an automatic relief during its return stroke.
A. true
B. false
.
.Answer: A
Explanation: It is the function of the toolhead. It works like an apron.
Q.Which of the following part does column contain?
A. lever
B. handle
C. both lever and handle
D. none of the mentioned
.
.Answer: C
Explanation: Column includes both lever and handle for operating the machine. Lever and handle are used to operate a machine.
Q.How many guideways does crossrail has on its top?
A. one
B. two
C. three
D. none of the mentioned
.
..Answer: B
Explanation: Crossrail has two guideways on its top. Guideways are a track or rail or path which are used along with movement.
Q.The crossrail has parallel guideways on its top in horizontal plane.
A. true
B. false
.
..Answer: B
Explanation: Crossrail doesn’t has parallel guideways on its top in horizontal but it has guideways on its top in vertical plane.
Q.The guideways are ______ to the ram axis in crossrail.
A. parallel
B. perpendicular
C. 45 degree inclined
D. none of the mentioned
.
..Answer: B
Explanation: As per the construction of the crossrail. Guideways are generally a path which are used for movement.
Q.The horizontal cross feed screw is fitted _____ to the top guideways.
A. parallel
B. horizontal
C. 45 degree inclined
D. none of the mentioned
.
.Answer: A
Explanation: It is fitted parallel to the top guideways. Cross feed is a type of feeding mechanism which acts transversely with respect to the longitudinal axis.
Q.The vertical cross feed screw actuates the table to move in a crosswise direction.
A. true
B. false
.
..Answer: B
Explanation: This is false. The horizontal cross feed screw actuates the table to move in a crosswise direction.
Q.In crossrail, the table may be raised or lowered to accommodate different sizes of jobs.
A. true
B. false
.
.Answer: A
Explanation: As per the working of the crossrail. The vertical motion of table is possible in crossrail so that the table can be adjusted for different size of work and can perform more better.
Q.Elevating screw causes the crossrail to slide up and down on the____ face of the column.
A. horizontal
B. vertical
C. bottom
D. top
.
..Answer: B
Explanation: Elevating screws enables vertical motion of crossrail. hence crossrail can easily slide up and down on the vertical face of the column.
Q.The saddle is mounted on _____
A. ram
B. toolhead
C. column
D. crossrail
.
.Answer: D
Explanation: It is mounted on crossrail. Saddle causes the different movements of table.
Q. Crosswise movements of the saddle causes the table to move sideways.
A. true
B. false
.
.Answer: A
Explanation: This is the working of a saddle. This saddle holds the table firmly on its top.
1Q.The cross feed screw can be rotated by_____
A. hand
B. power
C. both hand or power
D. none of the mentioned
.
.Answer: C
Explanation: It can be rotated by hand or power. This moment causes the table to move sideways.
1Q.The table is bolted to the saddle.
A. true
B. false
.
.Answer: A
Explanation: As per the construction of table. It is a box like casting having T-slots both on top and sides for clamping the work.
1Q.Which type of movement does table receives?
A. only crosswise
B. only vertical
C. both crosswise and vertical
D. none of the mentioned
.
.Answer: C
Explanation: Table receives both movements.This table is placed on the base in front of crossrail.
1Q.The ram is the reciprocating member of the shaper.
A. true
B. false
.
.Answer: A
Explanation: This is true. It houses a screwed shaft for altering the position of the ram with respect to the work and holds the tool head at the extreme forward end.
1Q.Toolhead of a shaper provides vertical and angular feed movements of the tool..
A. true
B. false
.
.Answer: A
Explanation: This is true. The toolhead of a shaper holds the tool rigidly, provides vertical and angular feed movement of the tool and allows the tool to have an automatic relief during its return stroke .
Q.In a shaper_____ movement of the drive is converted into _____ movement.
A. rotary, reciprocating
B. reciprocating, rotary
C. rotary, rotary
D. none of the mentioned
.
.Answer: A
Explanation: Rotary movement of the drive is converted into reciprocating movement.Rotary motion is something like wheel turning and reciprocating motion means back and forth linear mtioon.
Q.The size of a shaper is given by the maximum stroke length of the ram in mm.
A. true
B. false
.
.Answer: A
Explanation: It is the property of shaper. Here the ram is the reciprocating member of the shaper.
Q.The usual size of shaper varies from _____ mm.
A. 75 to 90
B. 175 to 900
C. 25 to 60
D. 125 to 600
.
..Answer: B
Explanation: The usual size of shaper ranges from 175 mm to 900 mm basede upon its application and working.
Q.The change of the movement of the drive is done by the mechanism contained within the _____ of the machine.
A. crossrail
B. column
C. toolhead
D. none of the mentioned
.
..Answer: B
Explanation: It is the function of column. Column is a part of shaper which is mounted on the base.
Q.The ram holding the tool gets _____ movement.
A. rotary
B. reciprocating
C. both rotary and reciprocating
D. none of the mentioned
.
..Answer: B
Explanation: It gets reciprocating movement.Rotary motion is something like wheel turning and reciprocating motion means back and forth linear mtioon.
Q.In a standard shaper, the metal is removed in_____ stroke.
A. forward
B. return
C. both forward and return
D. none of the mentioned
.
.Answer: A
Explanation: The metal is removed in forward stroke because only in forward stroke the useful work is done.
Q.To reduce the total cutting time, the standard shaper is designed to complete forward stroke______
A. slowly
B. faster
C. at moderate speed
D. none of the mentioned
.
.Answer: A
Explanation: It is the desired property for standard shaper because only in forward stroke the useful work is done. So it should be slower than return stroke.
Q.To reduce the total cutting time, the standard shaper is designed to complete return stroke______
A. slowly
B. faster
C. at moderate speed
D. none of the mentioned
.
..Answer: B
Explanation: In return stroke no useful work is done so to reduce cutting time it is advisable to complete the return stroke as fast as possible.
Q.Quick return mechanism and reciprocating movement of the ram is obtained in _____ mechanism.
A. crank and slotted link mechanism
B. whithworth quick return mechanism
C. hydraulic shaper mechanism
D. all of the mentioned
.
.Answer: D
Explanation: These both desired properties are obtained in all mentioned mechanisms. These are desired properties which is needed for any mechanism to perform more accurately and better.
Q. In crank and slotted link mechanism, an electric motor _____
A. rotates at constant speed
B. rotates at variable speed
C. doesn’t rotates
D. none of the mentioned
.
.Answer: A
Explanation: An electric motor rotates at constant speed in crank and slotted mechanism. As the crank rotates, the slotted link also oscillates. Here slotted link means lever.
Q.Bull gear also serves as a crank for the slotted link mechanism.
A. true
B. false
.
.Answer: A
Explanation: It is the function of bull gear. Here the slotted link means lever.
Q.In shaper mechanism, adjustment to be made before machining are_____
A. ramp speed
B. stroke adjustment
C. position adjustment
D. all of the mentioned
.
.Answer: D
Explanation: All these adjustment should be made before machining time in order to perform job more accurately and in a better way.
Q.The slide of the lever can move radially _____
A. inward
B. outward
C. inward or outward
D. none of the mentioned
.
.Answer: C
Explanation: The slide of the lever can move radially inward or outward. This is done in order to vary the radius of the crank.
Q.Stroke adjustment is done by varying the radius of the crank.
A. true
B. false
.
.Answer: A
Explanation: As per the mechanism of shaper. Depending upon the length of the job to be shaped, stroke length must be adjusted.
Q.In shaper mechanism, nearer the slide block to the center, _____ is the stroke.
A. smaller
B. larger
C. can’t say anything
D. none of the mentioned
.
.Answer: A
Explanation: In shaper mechanism, nearer the slide block to the center, smaller is the stroke and vice versa. More far the slide block to the center, larger is the stroke.
Q.In order to adjust the position of ram, the ram fixing screw is loosened.
A. true
B. false
.
.Answer: A
Explanation: When a job is mounted on the table of the shaper, the reciprocation of the ram may not occur over the length of the job properly. In order to adjust the position of ram, the ram fixing screw is loosened, the ram is then moved to the required position and the screw tightened again.
Q.The depth of cut is given by raising the tool slide on the tool head.
A. true
B. false
.
..Answer: B
Explanation: The depth of cut is given by lowering the tool slide on the tool head. This is done by using hand wheel.
Q.The ratchet wheel is fixed to the feed screw.
A. true
B. false
.
.Answer: A
Explanation: As per the feed mechanism of the shaper. Ratchet is a device that allow continuous motion in only one direction and oppose motion in opposite direction.
Q.The feed screw of the table rotates through a small angel in a direction _____ to the ram.
A. parallel
B. perpendicular
C. anti-parallel
D. none of the mentioned
.
..Answer: B
Explanation: As the crank disk keyed to the shaft of Bull gear rotates, the lever oscillates about the fulcrum movement of the lever in the anticlockwise direction results in the pawl engaging with the ratchet wheel and rotating it through a fraction of a rotation. When this happens, the feed screw of the table rotates through a small angel in a direction perpendicular to the ram.
Q. In crank and slotted link mechanism, as the crank rotates, the slotted link(lever) oscillates.
A. true
B. false
.
.Answer: A
Explanation: As per the definition of crank and slotted link mechanism. This makes the ram reciprocate and therefore the cutting tool fixed to it.
Q.Which type of cutting parameters are there in shaper?
A. feed
B. depth of cut
C. machining time
D. all of the mentioned
.
.Answer: D
Explanation: Feed, depth of cut, machining time all are cutting parameters. Apart from these, cutting speed and metal removal rate are also termed as cutting parameters.
Q.The cutting action in shaper is intermittent.
A. true
B. false
.
.Answer: A
Explanation: As per the definition of this machine. The shaper is a reciprocating machine which works only in forward stroke.
Q.In shaper, cutting speed is expressed only in ______ stroke.
A. forward
B. return
C. both forward and return
D. none of the mentioned
.
.Answer: A
Explanation: Only in forward stroke, cutting speed is expressed because only in forward stroke useful work is done.
Q.What is the unit of cutting speed?
A. meter/minute
B. meter2 /minute
C. meter
D. none of the mentioned
.
.Answer: A
Explanation: Cutting speed is simply a speed. So its unit should be the unit of time. Here, meter/minute is more appropriate unit for cutting speed.
Q.Calculation of cutting speed is quite difficult in shaper compare to others.
A. true
B. false
.
.Answer: A
Explanation: It is quite difficult to calculate cutting speed as we have to measure the time required by the cutting stroke.
Q.Cutting speed= (length of the cutting stroke) / (time required by the cutting stroke).
A. true
B. false
.
.Answer: A
Explanation: It is the formula for calculating the cutting speed.It may be expressed as length (distance) / time.
Q.If n=number of strokes of the ram per minute or rpm of the bull wheel, l=length of the cutting stroke in mm, m= the ratio between return time to cutting time, then find the formula for cutting stroke.
A. n*l*m / 100
B. n*l*(m+1) / 100
C. (l*m) / (n*100)
D. none of the mentioned
.
..Answer: B
Explanation: (n*l* (m+1)) – It is the right formula for calculating the cutting speed.
Q.Feed is always given when the tool is cutting the metal.
A. true
B. false
.
..Answer: B
Explanation: This is false. The feed is always given when the tool is not cutting the metal.
Q.The feed is always given at the ______ of the return stroke.
A. starting
B. end
C. both at the starting and at the end
D. none of the mentioned
.
..Answer: B
Explanation: It is always given at the end of the return stroke because only in the forward stroke useful work is done.
Q. Feed is expressed in _______
A. mm
B. mm/minute
C. minute
D. none of the mentioned
.
.Answer: A
Explanation: It is expressed in mm. Feed is simply a distance so it unit should be the unit of distance.
Q.The feed is the relative movement of tool or work.
A. true
B. false
.
.Answer: A
Explanation: This is the definition of feed. It is simply a distance measured with help of relative movement of tool or work.
Q.Feed is in direction _______ to the axis of reciprocation of the arm per double stroke.
A. parallel
B. perpendicular
C. 45 degree inclined to both planes
D. none of the mentioned
.
..Answer: B
Explanation: Feed is in direction perpendicular to the axis of reciprocation of the arm per double stroke because only in this case we get the efficient feed and accuracy.
Q.Depth of cut is thickness of metal that is removed in two cut.
A. true
B. false
.
..Answer: B
Explanation: Depth of cut is thickness of metal that is removed in one cut. Depth of cut is always measured in one cut.
Q.Depth of cut is the _______ distance between machined surface and non-machined surface of the workpiece.
A. parallel
B. perpendicular
C. 45 degree inclined to both planes
D. none of the mentioned
.
..Answer: B
Explanation: It is the perpendicular distance. Depth of cut is thickness of metal that is removed in one cut.
Q.Depth of cut is expressed in ______
A. mm
B. mm/minute
C. minute
D. none of the mentioned
.
.Answer: A
Explanation: Depth of cut is simply a distance and so its unit should be match with distance’s unit.
Q.Depth of cut may be given by _____
A. tool head slide
B. lifting the table
C. both tool head slide or drifting the table
D. none of the mentioned
.
.Answer: C
Explanation: Depth of cut may be given by tool head slide or lifting the table. These two methods are used because of its accuracy and good performance.
Q.If v=cutting speed, s= feed in mm, b=width of work in mm, m=the ratio between the return time to cutting time and l= length of the cutting stroke in mm. Then, find the formula for time.
A. (l*b*m) / ( 1000*v*s)
B. (l*b*(1+m) ) / ( 1000*v*s)
C. (l*b*v) / ( m*s*1000)
D. none of the mentioned
.
..Answer: B
Explanation: (l*b(1+m))/ (1000*v*s)-It is the formula for machining time. Machining time is simply time taken by machine to perform the job.
Q.What is the unit for machining time?
A. minute
B. mm/minute
C. mm
D. none of the mentioned
.
.Answer: A
Explanation: It is simply a time and so its unit should match with time’s unit.
Q.If d=depth of cut in mm, f=feed in mm/stroke, n=stroke/min, l=length of stroke in mm, m= ratio of return stroke time to cutting stroke time, then find the formula for metal removal rate.
A. f*d*l*n*(m+1)
B. f*d*l*n*m
C. f*d*l*n*m/1000
D. none of the mentioned
.
.Answer: A
Explanation: ( f*d*l*n*(m+1) ) – is the right formula for metal removal rate as per the definition of metal removal rate.
Q. What is the unit of metal removal rate?
A. mm2/minute
B. mm3/minute
C. mm/minute
D. none of the mentioned
.
.Answer: A
Explanation: Metal removal rate includes feed(mm/stroke), depth of cut(mm), n= rpm (stroke/min), length(mm) and m(ratio). Writing all terma appropriately with uints, you get Mm^3/minute as the unit for metal removal rate.
Q.If the length of the cutting stroke is 10 mm and time required by the cutting stroke is 5 second, then find the value of cutting speed in mm/second.
A. 2
B. 0.5
C. 4
D. none of the mentioned
.
.Answer: A
Explanation: C.S.=length / time. Here, length is 10 mm and time is 5 second. So by dividing 10 by 5 we can easily get the answer as 2.
Q.If l=5, b=5, t=0.4, v=3 and m= Q.Find the value of s. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 0.025
B. 0.0125
C. 0.00625
D. none of the mentioned
.
.Answer: C
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). By putting all given values, we can easily get answer as 0.00625.
Q.If n=rpm of the bull wheel=2, l= length of the cutting stroke in mm=2.5mm and cutting speed = 0.5 mm/minute. m= the ratio between return time to cutting time. Then find the value of m.
A. 10
B. 9
C. 100
D. 99
.
..Answer: B
Explanation: C.S. = n*l* (1+m) / 100. Here, n=2, l=2.5, cs=0.5 and m can be found by putting these values in the above equation.
Q.If n=rpm of the bull wheel=4 ,cs =cutting speed=3mm/minute and m= the ratio between return time to cutting time= Q.Then find the value of length of cutting stroke (l) in mm.
A. 25
B. 50
C. 12.5
D. 6.24
.
.Answer: C
Explanation: C.S. = n*l* (1+m) / 100. Here, n=4, cs=3, m=5 and l can be found out by putting these values in above equation.
Q.If l=9, b=5, s=3, v=2 and t=0. 037Q.Find the value of m. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 2
B. 5
C. 10
D. none of the mentioned
.
.Answer: D
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s) , m should be 4.
Q.If n=rpm of the bull wheel, cs =cutting speed=3.2mm/minute and m= the ratio between return time to cutting time= 3 and l=length of cutting stroke (l)=8mm. Find the value of n.
A. 2
B. 5
C. 12
D. none of the mentioned
.
.Answer: D
Explanation: C.S. = n*l* (1+m) / 100 and value of n should be 10 by putting all parameters in above equation.
Q.If l=10, b=5, s=4, v=3 and m= Q.Find the value of t. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 0.025
B. 0.0125
C. 0.00625
D. none of the mentioned
.
..Answer: B
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s), we can easily calculate the value of t by putting all these values in given equations.
Q.If l=15, b=4, s=3, m=2 and t= Q.Find the value of v. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 0.06
B. 0.03
C. 0.12
D. none of the mentioned
.
.Answer: A
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). From this equation, we can easily calculate the value of v by putting all mentioned values.
Q.If n=rpm of the bull wheel=2, l= length of the cutting stroke in mm=3mm and m= the ratio between return time to cutting time= Q.Then find the value of cutting speed in mm/minute.
A. 0.3
B. 0.36
C. 0.15
D. 0.18
.
..Answer: B
Explanation: C.S. = n*l* (1+m) / 100. Here l=3mm, n=2, m=Q.So by putting these values in the above equation we can easily get the answer as 0.36.
Q. If l=20, t=5, s=4, v=3 and m= Q.Find the value of b. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 100
B. 1000
C. 10000
D. none of the mentioned
.
..Answer: B
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). We can get the value of b by putting all mentioned values in the given equation.
1Q.If t=0.10, b=5, s=4, v=1 and m= Q.Find the value of l. l=length of the cutting stroke in mm, b=width of the work in mm, s=feed in mm, v=cutting speed in mm/minute, m=the ratio between return time to cutting time and t=machining time in minute.
A. 26.66
B. 53.33
C. 13.33
D. none of the mentioned
.
.Answer: A
Explanation: From the formula, t= l*b*(m+1) / (1000*v*s). We can get the value of l by putting all the values in the given equation.
