Category: Machine Tools & Machining Objective Questions

Machine Tools and Machining Questions & Answers for entrance exams on “Classification of Drilling Machine : According to Length to Diameter Ratio and Shank Type”.

1. If l/d ratio is too large, then drill becomes_______
a) weak
b) strong
c) very sharp
d) none of the mentioned
Answer: a
Clarification: The large l/d ratio weaken the drill. If we have very long drill with small diameter then it can’t perform drilling operation more accurately.

2. If l/d ratio is too short, then chip removal will be difficult.
a) true
b) false
Answer: a
Clarification: Chip removal will be difficult if this ratio is too short. Short l/d ratio weakens the drilling and reduce the performance. So the chip removal will be difficult.

3. Long drills are used for deep holes.
a) true
b) false
Answer: a
Clarification: As per the definition of long drill. Long drills has high l/d ration. So it can make high deeply holes.

4. For general purpose, l/d ratio should be_____
a) 5 to 10
b) 10 to 20
c) more than 20
d) none of the mentioned
Answer: a
Clarification: For general purpose, the ratio should be 5 to 10. The drills containing these ratio generally used in ordinary performances.

5. Which of the following can also be termed as center drill?
a) general drill
b) short drill
c) long drill
d) none of the mentioned
Answer: b
Clarification: Short drill can also be termed as centerr drill.

6. For long drills, l/d ratio should be more then 25.
a) true
b) false
Answer: a
Clarification: For long drills, this ratio should be more than 25. For general purpose it should have ratio of 5 to 10.

7. For small drill, l/d ratio should be 8 to 10.
a) true
b) false
Answer: b
Clarification: This is false. For small drill, l/d ratio should be 2 or 3.

8. According to the shank type, drill can be classified as______
a) straight shank
b) taper shank
c) both taper shank and straight shank
d) none of the mentioned
Answer: c
Clarification: Both taper shank and straight shank are the type of shank drill. Brace shank, straight shank, hex shank etc. are the type of shanks.

9. In ______ type, drill is held in spindle directly.
a) straight shank
b) taper shank
c) can’t say anything
d) none of the mentioned
Answer: b
Clarification: In taper type, drill is held in spindle directly. Taper shank drill is like a general purpose drill.

10. In _______ type, drill is held in chuck.
a) straight shank
b) taper shank
c) can’t say anything
d) none of the mentioned
Answer: a
Clarification: In straight type, drill is held in chuck. It is also known as reduced shank or blacksmith’s drill.

Machine Tools and Machining for entrance exams,

Machine Tools Multiple Choice Questions on “Shaper Cutting Parameters – 2”.

1. The feed is the relative movement of tool or work.
a) true
b) false
Answer: a
Clarification: This is the definition of feed. It is simply a distance measured with help of relative movement of tool or work.

2. 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
Clarification: 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.

3. Depth of cut is thickness of metal that is removed in two cut.
a) true
b) false
Answer: b
Clarification: Depth of cut is thickness of metal that is removed in one cut. Depth of cut is always measured in one cut.

4. 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
Clarification: It is the perpendicular distance. Depth of cut is thickness of metal that is removed in one cut.

5. Depth of cut is expressed in ______
a) mm
b) mm/minute
c) minute
d) none of the mentioned
Answer: a
Clarification: Depth of cut is simply a distance and so its unit should be match with distance’s unit.

6. 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
Clarification: 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.

7. 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
Clarification: (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.

8. What is the unit for machining time?
a) minute
b) mm/minute
c) mm
d) none of the mentioned
Answer: a
Clarification: It is simply a time and so its unit should match with time’s unit.

9. 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
Clarification: ( f*d*l*n*(m+1) ) – is the right formula for metal removal rate as per the definition of metal removal rate.

10. What is the unit of metal removal rate?
a) mm²/minute
b) mm³/minute
c) mm/minute
d) none of the mentioned
Answer: a
Clarification: 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.

Machine Tools Multiple Choice Questions on “Types of Lathe”.

1. Which type of lathe is also known as centre lathe?
a) engine lathe
b) bench lathe
c) room lathe
d) capstan lathe
Answer: a
Clarification: Engine lathe is also known as the centre lathe. This centre lathe is generally used for the production of cylindrical surfaces.

2. Wheel lathe is the type of ____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: d
Clarification: 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.

3. Wood working lathe is the type of ____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: c
Clarification: Wood lathe is the type of speed lathe. Speed lathe can revolve spindle with great speed. It is also used for turning small objects.

4. Geared lathe is the type of____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: a
Clarification: Geared lathe is the type of engine lathe. Engine lathe is a screw cutting type lathe. It has back-geared cone-driven headstock.

5. Belt driven lathe is the type of____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: b
Clarification: 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.

6. Duplicating lathe is the type of____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: d
Clarification: As per the classification of lathe, duplicating lathe the type of special purpose lathe. It is rarely used.

7. Spinning lathe is the type of____
a) engine lathe
b) centre lathe
c) speed lathe
d) special purpose lathe
Answer: c
Clarification: 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.

8. 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
Clarification: 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.

9. Which of the following is special purpose lathe?
a) polishing lathe
b) centering lathe
c) spinning lathe
d) none of the mentioned
Answer: d
Clarification: Polishing lathe, centering lathe and spinning lathe are the examples of speed lathe.

10. 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
Clarification: Wheel lathe and gap bed lathe are the examples of the special purpose lathe while polishing lathe is an example of speed lathe.

11. T – lathe is the example of bench lathe.
a) true
b) false
Answer: b
Clarification: This is false. T – lathe is the example of special purpose lathe.

12. 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
Clarification: 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.

13. 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
Clarification: 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.

14. Wood working lathe is the example of capstan and turret lathe.
a) true
b) false
Answer: b
Clarification: This is false. Wood working lathe is the example of speed lathe.

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,