Category: Machine Tools & Machining Objective Questions

Machine Tools Multiple Choice Questions on “Lathe : Angel Plates and Face Plates”.

1. Angle plate is a cast iron plate.
a) true
b) false
Answer: a
Clarification: Angle plates are always used along with face plates and for its stability it is made up of iron.

2. How many machined faces do angle plates have?
a) 1
b) 2
c) 3
d) 4
Answer: b
Clarification: Angle plates have two plates. Both of these plates are placed perpendicular to each other.

3. 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
Clarification: 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.

4. Angle plates are used in conjunction with a face plate.
a) true
b) false
Answer: a
Clarification: Angle plates are used in conjunction with a face plate. It can be easily understood by looking at the working of the angle plates.

5. 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
Clarification: Clamping is used for this both purposes. Angel plate is used in machining a flange of a pipe elbow.

6. 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
Clarification: 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.

7. Face plates are used with_____ accessories.
a) clamps
b) T- bolts
c) stepped block
d) all of the mentioned
Answer: d
Clarification: 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.

8. 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
Clarification: 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.

9.The position of the bolts and clamps is very important in face plates.
a) true
b) false
Answer: a
Clarification: 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.

10. 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
Clarification: 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.

11. 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
Clarification: 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.

12. Faces of angle plates are_____ to each other.
a) parallel
b) perpendicular
c) inclined
d) none of the mentioned
Answer: b
Clarification: Faces are perpendicular to each other in case of angle plates. This angel plates are used in balance weight, ello pipe and so on.

13. 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
Clarification: 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.

Machine Tools Multiple Choice Questions on “Table Top Drilling Machine”.

1. Table top drilling machine can be categorized as_______
a) general purpose drilling machine
b) specific purpose drilling machine
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: Table top drilling machine can be categorized as general purpose drilling machine as it is not used for any specific application.

2. Which type of feed can be given in table top drilling machine?
a) manual
b) power
c) both manual and power feed
d) none of the mentioned
Answer: a
Clarification: Manual feed is given in this machine. We don’t deal with very heavy jobs in table top drilling machine so manual feed can perform job sufficiently.

3. Power produced by table top drilling machine is comparatively low.
a) true
b) false
Answer: a
Clarification: This is true. Power produced is comparatively low because manual feed is given to this machine, not powered feed.

4. In table top drilling machine, feed can be operated by_____
a) gear mechanism
b) lever
c) spindle
d) none of the mentioned
Answer: b
Clarification: The feed can be operated by lever in this machine. This lever can be operated manually to provide feed.

5. Generally, table top drilling machine can produce diameters up to______
a) 1 mm
b) 10 mm
c) 100 mm
d) none of the mentioned
Answer: b
Clarification: It can produce diameter up to 10 mm. As it is operated by manual feed, its power production is low so it is not used for producing large diameters.

6. Table top drilling machine can be mounted on the table.
a) true
b) false
Answer: a
Clarification: It can be mounted or clamped on the table to accommodate with job.

7. Table top drilling machine is generally______ in terms of height.
a) small
b) big
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: Table tap drilling machine is comparatively small in terms of height. It is hardly 1 to 3 feet long in height.

8. In table top drilling machine, belt-pulley system operates______
a) lever
b) spindle
c) both lever and spindle
d) none of the mentioned
Answer: b
Clarification: Spindle is operated by this belt-pulley system. Lever can be operated manually for feed.

9. Drill is mounted on lever in table top drilling machine.
a) true
b) false
Answer: b
Clarification: This is false. Drill is mounted on spindle in table top drilling machine.

10. Which of the following is not true for table top drill machine?
a) it is used in only small jobs
b) it is used for mass production
c) odd shape jobs are not machined
d) none of the mentioned
Answer: b
Clarification: All mentioned are true accept the sentence which says that it is usede for mass production. It cannot be used for mass production. It is very small and used only for small job work.

Machine Tools and Machining Questions & Answers for campus interviews on “Classification of Drilling Machine : According to Specific Use”.

1. According to specific use, drill can be classified as______
a) center drill
b) step drill
c) both center drill and step drill
d) none of the mentioned
Answer: c
Clarification: Both are the examples of specific use drill. These special purpose drilling machines are intended for drilling multiple holes at a single setting.

2. Subland drill is type of drill according to______
a) l/d ratio
b) shank type
c) specific use
d) none of the mentioned
Answer: c
Clarification: Subland drill is the example of special purpose drilling machine. Apart from this, turret, micro drill press and muliple spindle drilling machines are also an example of specific purpose drilling machine.

3. Which of the following drill is very short drill?
a) center drill
b) subland drill
c) step drill
d) none of the mentioned
Answer: a
Clarification: Center drill is very short drill. Subland drill and step drill are large as compare to center drill.

4. Which of the following is not true for center drill?
a) the hole is used to support the center
b) it is the type of drill according to specific use
c) one taper has to be made here
d) none of the mentioned
Answer: d
Clarification: All the mentioned sentences are true. It has a taper and also it is a specific purpose drill machine. It is short drill.

5. In center drill, center has to be mounted on______
a) headstock
b) tailstock
c) headstock or tailstock
d) none of the mentioned
Answer: c
Clarification: The center can be mounted on either headstock or tailstock. Headstock and tailstock both are mounted on the bed.

6. In which of the following, l/d ratio is very long?
a) half round drill
b) gun drill
c) both half round drill and gun drill
d) none of the mentioned
Answer: c
Clarification: Here l=length and d=diameter. In both half round drill and gun drill this ratio is very long as they have large value of length as compare to diameter.

7. How many cutting edges are there in half round drill and gun drill?
a) one
b) two
c) may be one or two
d) none of the mentioned
Answer: a
Clarification: One edge is there in these both half round drill and gun drill. In these both drills, diameter is less as compare to length.

8. How many flutes are there in half round drill and gun drill?
a) one
b) two
c) may be one or two
d) none of the mentioned
Answer: c
Clarification: One or two flutes are there in these both machines. These both machines are specific purpose machines used for a specific purpose.

9. In half round drill, base is weak.
a) true
b) false
Answer: b
Clarification: This is false. The base is very strong in half round drill.

10. Which of the following is a pipe like cutting tool?
a) center drill
b) half round drill
c) gun drill
d) none of the mentioned
Answer: d
Clarification: Trepanning tool has this structure. It structure looks like a pipe.

11. Trepanning is feasible for hard materials.
a) true
b) false
Answer: b
Clarification: This is false. Trepanning is not feasible for hard materials. It is feasible for soft material.

Machine Tools and Machining for campus interviews,

tricky Machine Tools and Machining questions and answers on “Numericals on Shaper Machine”

1. 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
Clarification: 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.

2. If l=5, b=5, t=0.4, v=3 and m= 2. 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
Clarification: From the formula, t= l*b*(m+1) / (1000*v*s). By putting all given values, we can easily get answer as 0.00625.

3. 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
Clarification: 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.

4. If n=rpm of the bull wheel=4 ,cs =cutting speed=3mm/minute and m= the ratio between return time to cutting time= 5. Then find the value of length of cutting stroke (l) in mm.
a) 25
b) 50
c) 12.5
d) 6.24
Answer: c
Clarification: 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.

5. If l=9, b=5, s=3, v=2 and t=0. 0375. 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
Clarification: From the formula, t= l*b*(m+1) / (1000*v*s) , m should be 4.

6. 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
Clarification: C.S. = n*l* (1+m) / 100 and value of n should be 10 by putting all parameters in above equation.

7. If l=10, b=5, s=4, v=3 and m= 2. 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
Clarification: 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.

8. If l=15, b=4, s=3, m=2 and t= 1. 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
Clarification: 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.

9. 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= 5. Then find the value of cutting speed in mm/minute.
a) 0.3
b) 0.36
c) 0.15
d) 0.18
Answer: b
Clarification: C.S. = n*l* (1+m) / 100. Here l=3mm, n=2, m=5. So by putting these values in the above equation we can easily get the answer as 0.36.

10. If l=20, t=5, s=4, v=3 and m= 2. 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
Clarification: 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.

11. If t=0.10, b=5, s=4, v=1 and m= 2. 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
Clarification: 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.

To practice tricky questions and answers on all areas of Machine Tools and Machining,

Machine Tools Multiple Choice Questions on “Lathe : Bed”.

1. Which of the following is the base of the lathe machine?
a) bed
b) tailstock
c) headstock
d) none of the mentioned
Answer: a
Clarification: Bed is the base of the lathe machine. This provides the necessary working height for the lathe.

2. 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
Clarification: These both are fitted on the bed as per the definition. This is the structure on which the entire lathe parts are situated.

3. The bed generally rest on copper structure.
a) true
b) false
Answer: b
Clarification: This is false. Actually, the bed generally rest on cast iron or welded structure.

4. 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
Clarification: 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.

5. Which of the following provides foundation for the whole machine?
a) tailstock
b) bed
c) headstock
d) carriage
Answer: b
Clarification: As per the definition of the bed. It is the base of lathe which provides needed height as well as foundation for whole machine.

6. Small lathes have a sliding bed.
a) true
b) false
Answer: b
Clarification: This is false. Generally, small lathes don’t need a sliding bed. Very large lathes have a sliding bed.

7. There are some beds, which hold a gap closer to the headstock.
a) true
b) false
Answer: a
Clarification: 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.

8. 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
Clarification: 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.

9. 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
Clarification: Mainly this bed design is offered in 30 and 45 slant angles, but sometimes slant bed of 60 degree type is also offered.

10. 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
Clarification: 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.

11. There are some beds, which hold a gap closer to the headstock.
a) true
b) false
Answer: a
Clarification: The gap is there so that it can permit bigger diameters to be tuned.

12. Which of the following is the part of bed?
a) vee slide
b) machine ways
c) headstock
d) all of the mentioned
Answer: d
Clarification: All are the parts of the bed. This bed and its parts generally assigned iron casting.

13. 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
Clarification: 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.

Machine Tools Multiple Choice Questions on “Lathe : Mandrels and Its Types-1”.

1. Mandrels are used for holding solid work piece.
a) true
b) false
Answer: b
Clarification: This is false. Mandrels are used for holding hollow work piece.

2. Which of the following is not true?
a) the work piece must have their bores machined accurately
b) the mandrels are to be located before the centres
c) mandrels are used for turning concentric
d) none of the mentioned
Answer: b
Clarification: All the sentences are true except one which says that the mandrel are to be located before the centres. The mandrels should be located in between the centres.

3. Mandrels are driven by_____
a) catch plates
b) carriers
c) catch plates and carriers both
d) none of the mentioned
Answer: c
Clarification: Both are used to drive the mandrels. Catch plates are either screwed or bolted to the nose of the tailstock spindle while the carriers consist of a cast iron or forged steel body.

4. The diameters at the beginning are slightly smaller and flattened.
a) true
b) false
Answer: b
Clarification: This is false. The diameters at the end are slightly smaller and flattened to provide effective gripping surface of the lathe dog set screw..

5. Why gripping mandrels are made of high carbon steel?
a) to avoid distortion
b) to avoid wear
c) both to avoid distortion and wear
d) none of the mentioned
Answer: c
Clarification: The gripping mandrels are made of high carbon steel to avoid both distortion and wear. Along with this, the gripping power of this mandrels is not much.

6. Less common but very often used method is_____
a) parallel mandrel
b) threaded cone mandrel
c) both parallel mandrel and threaded cone mandrel
d) none of the mentioned
Answer: c
Clarification: There are several types of mandrels in use depending upon the specific requirements of the job. Less common but very often used is the parallel mandrel and the threaded cone mandrel.

7. The mandrels are driven into the work by tapping by_____
a) copper hammers
b) lead hammers
c) copper hammer and lead hammer both
d) none of the mentioned
Answer: c
Clarification: The mandrels are driven into the work by tapping with copper and lead hammers or by an arbor press or by mandrel press.

8. Which of the following is not true?
a) the mandrels are used depending upon the specific requirements of the job.
b) the gripping power of mandrels is very high
c) effective gripping surface of the lathe dog set screw is done
d) none of the mentioned
Answer: b
Clarification: All mentiones sentences are true except one which says that the gripping power of the mandrel is very high. The gripping power of the mandrels is not much.

9. Which of the following is the type of mandrels?
a) plain mandrels
b) stepped mandrels
c) collar mandrels
d) all of the mentioned
Answer: d
Clarification: All of mentioned are the types of mandrels. Apart from these other types of mandrels are also there like expansion mandrel, gang mandrel and so on.

10. Turning a job on mandrel should be with heavy cuts.
a) true
b) false
Answer: b
Clarification: This is false. Turning a job on mandrels should be with light cuts.

11. Which of the following mandrels are most commonly used?
a) plain mandrels
b) stepped mandrels
c) collar mandrels
d) none of the mentioned
Answer: a
Clarification: The plain mandrels are most commonly used. It is also known as simple mandrel.

12. Plain mandrels are used where large number of identical work pieces having standard size holes are required to be mounted.
a) true
b) false
Answer: a
Clarification: It can be easily understood from definition of the plain mandrels. In this mandrel, the size of the mandrel is indicated at the flat end portion of the mandrel.

13. The difference in diameter is_____ mm per 100 mm length in case of the plain mandrels.
a) 1to 2
b) 4 to 5
c) 8 to 10
d) 10 to 12
Answer: a
Clarification: The difference in diameter is 1 to 2 mm per 100 mm length in case of the plain mandrels. The taper is provided for proper gripping of the work.

14. Plain mandrel is suitable for_____ size of bore.
a) only one
b) two
c) more than two
d) none of the mentioned
Answer: a
Clarification: Plain mandrel is suitable for only one size of bore. For different sizes of holes in workpieces different diameters of mandrels are used.

15. In plain mandrels, length varies from_____ mm.
a) 15 to 90
b) 125 to 300
c) 55 to 430
d) 235 to 660
Answer: c
Clarification: In plain mandrels, length varies from 55 to 430 mm. The body of this mandrel is slightly tapered.