Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 253 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

In metal cutting process
A. material removal is affected by relative motion between tool and the workpiece
B. material removal is not affected by relative motion between tool and the workpiece
C. Both A & B
D. None of the above
Answer» B. material removal is not affected by relative motion between tool and the workpiece
Discussion
2.

Mechanical working processes are performed on metals
A. to achieve optimum mechanical properties in the metal
B. to improve the mechanical strength of the metal
C. to make metal dense
D. all of the above
Answer» E.
Discussion
3.

The device which is used to remove workpiece from close-fitting locators, after the workpiece has been removed is called as
A. remover
B. ejector
C. escaper
D. blocker
Answer» C. escaper
Discussion
4.

The surface of the single point cutting tool on which the chips formed in cutting operation slide is called as
A. flank
B. heel
C. face
D. shank
Answer» D. shank
Discussion
5.

Jigs and fixtures are
A. machining tools
B. precision tools
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
6.

Which type of chips form while machining of brittle materials?
A. continuous chipsq
B. discontinuous chips
C. Built-up chips
D. all of the above with some proportion
Answer» C. Built-up chips
Discussion
7.

Which of the following is not a method employed for analysis of manufacturing system?
A. Statistical techniques
B. Probability models
C. Simulation models
D. Waiting line models
Answer» C. Simulation models
Discussion
8.

Which of the following production processes is least flexible?
A. Job order production
B. Batch or quantity production
C. Mass production
D. none of the above
Answer» D. none of the above
Discussion
9.

Which of the following activities or operations is not related to manufacturing?
A. Product design and development
B. Inventory control
C. Quality assurance
D. None of the above
Answer» E.
Discussion
10.

In general, any system that produces useful products or services is called as
A. service system
B. production system
C. both a. and b.
D. none of the above
Answer» C. both a. and b.
Discussion
11.

The decision of what parts to be manufactured and what parts to be purchased from market is taken in
A. selection of manufacturing process
B. process planing
C. analysis of manufacturing system
D. none of the above
Answer» C. analysis of manufacturing system
Discussion
12.

Which of the following is an example of constant mass manufacturing process?
A. Rolling
B. Turning
C. Broaching
D. Sawing
Answer» B. Turning
Discussion
13.

Gas welding is a type of
A. constant mass process
B. material removal process
C. material addition process
D. none of the above
Answer» D. none of the above
Discussion
14.

Arrange the below operations in operator controlled machine tool in correct order. (A) Operator (B) Process planing (C) Machine tool (D) Component drawing (E) Completed component
A. (A) – (D) – (B) – (C) – (E)
B. (D) – (B) – (C) – (A) – (E)
C. (B) – (D) – (C) – (A) – (E)
D. (D) – (B) – (A) – (C) – (E)
Answer» E.
Discussion
15.

The cutting tool removes the metal from workpiece in the form of
A. solid blocks
B. powder
C. chips
D. all of the above
Answer» D. all of the above
Discussion
16.

Why is the selection of right manufacturing process important?
A. to produce the product with least cost
B. to produce the product within reasonable time
C. to produce the product at its best possible quality
D. all of the above
Answer» E.
Discussion
17.

Open-loop control system is
A. less accurate than closed-loop control system
B. more accurate than closed-loop control system
C. equally accurate to closed-loop control system
D. cannot say
Answer» B. more accurate than closed-loop control system
Discussion
18.

Which machine tool reduces the number of set-ups in machining operation, time spent in setting machine tools and transportation between sections of machines?
A. Computer Numerical Control machine tool
B. Direct Numerical Control machine tool
C. Adaptive Control Systems
D. Machining centre
Answer» E.
Discussion
19.

The spark gap in Electrical Discharge Machining (EDM) process is maintained such that
A. the gap voltage is around 99% of supply voltage
B. the gap voltage is around 70% of supply voltage
C. the gap voltage is around 50% of supply voltage
D. the gap voltage is around 10% of supply voltage
Answer» C. the gap voltage is around 50% of supply voltage
Discussion
20.

Which of the following is not a media of energy transfer on which the advanced machining processes are classified?
A. Reactive atmosphere
B. Electrons
C. Electrolyte
D. Chemical ablation
Answer» E.
Discussion
21.

The device which place the workpiece in the same position, in jig and fixture, cycle after cycle is called as
A. placing device
B. fixing device
C. locating device
D. positioning device
Answer» D. positioning device
Discussion
22.

V-blocks (Vee locators) are used for clamping as well as locating when faces are inclined upto
A. 30°
B. 12°
C. 9°
D. 3°
Answer» E.
Discussion
23.

What is the reason for using unconventional or advanced machining processes?
A. Complex surfaces
B. High accuracy and surface finish
C. High strength alloys
D. All of the above
Answer» E.
Discussion
24.

Continuous chips are formed during metal cutting operation due to
A. ductile work materials
B. large rake angle
C. high cutting speed
D. all of the above
Answer» E.
Discussion
25.

The device, fed to the control unit of NC machine tool which sends the position command signals to sideway transmission elements of the machine, is called as
A. controller
B. tape
C. feedback unit
D. none of the above
Answer» C. feedback unit
Discussion
26.

In NC (Numerical Control) machine tool, the position feedback package is connected between
A. control unit and programmer
B. programmer and machine tool
C. control unit and machine tool
D. programmer and process planning
Answer» D. programmer and process planning
Discussion
27.

Which of the following sentences are true for jigs and fixtures? 1. Using jigs and fixture produce work rapidly 2. High speed, feed and depth of cut can be used in machining with the help of jigs and fixtures 3. Jigs and fixture cannot be used in machining of complex and heavy components
A. (1) and (2)
B. (2) and (3)
C. (1) and (3)
D. All of the (1), (2) and (3)
Answer» B. (2) and (3)
Discussion
28.

How jigs are in terms of weight compared to fixtures?
A. Jigs are lighter than fixtures
B. Jigs are heavier than fixtures
C. Jigs are equal in weight to fixtures for same operation
D. cannot say
Answer» B. Jigs are heavier than fixtures
Discussion
29.

In Electrical Discharge Machining (EDM) process the metal removal is carried out by
A. electrolysis
B. melting and vaporisation
C. fracture of work material due to impact of grains
D. none of the above
Answer» C. fracture of work material due to impact of grains
Discussion
30.

Which of the following materials is/are used for Electrical Discharge Machining (EDM) process?
A. Brass
B. Copper
C. Graphite
D. All of the above
Answer» E.
Discussion
31.

A device, in which a component is held and located for a specific operation and bushes are integrated that guide the tool, is called as
A. jig
B. fixture
C. both a. and b.
D. none of the above
Answer» B. fixture
Discussion
32.

Fixtures are used in connection with
A. drilling operation
B. reaming operation
C. tapping operation
D. milling operation
Answer» E.
Discussion
33.

Which of the following statements are true for Electro-Chemical Machining (ECM)? 1. ECM is capable of machining metals and alloys irrespective of their strength and hardness 2. No cutting forces are involved in ECM process 3. ECM process consumes very high power 4. Very small space is required to set up ECM process
A. (1), (2) and (3)
B. (2), (3) and (4)
C. (1), (3) and (4)
D. (1), (2) and (4)
Answer» B. (2), (3) and (4)
Discussion
34.

Which of the following processes is generally applied for dentistry work like to drill fine holes of particular shape in teeth?
A. Electrical Discharge Machining (EDM)
B. Electron Beam Machining (EBM)
C. Laser Beam Machining (LBM)
D. Ultrasonic Machining (USM)
Answer» E.
Discussion
35.

Which of the following options is correct for the control unit and panel of NC (Numerical Control) and CNC (Computer Numerical Control) machine tools?
A. The control unit of NC machine tool works in ON-line mode and the control unit of CNC machine tool works in batch processing mode
B. The control unit of NC machine tool works in batch processing mode and the control unit of CNC machine tool works in ON-line mode
C. The control units of both NC and CNC machines work in ON-line mode
D. The control units of both NC and CNC machines work in batch processing mode
Answer» C. The control units of both NC and CNC machines work in ON-line mode
Discussion
36.

In CNC machine tool, the part program entered into the computer memory
A. can be used only once
B. can be used again and again
C. can be used again but it has to be modified every time
D. cannot say
Answer» C. can be used again but it has to be modified every time
Discussion
37.

Which operation can correct hole location, size or alignment of the hole which is already drilled in workpiece?
A. Boring
B. Rimming
C. Both a. and b
D. None of the above
Answer» B. Rimming
Discussion
38.

Calculate the cutting speed of drilling operation when diameter of drill is 10 mm and rotational speed of drill is 200 r.p.m.
A. 6.283 m/min
B. 3.142 m/min
C. 8.362 m/min
D. 10.216 m/min
Answer» B. 3.142 m/min
Discussion
39.

Which of the following is an example of thermoplastic material?
A. Camera bodies
B. Automobile parts
C. Electric plugs
D. Electric insulation
Answer» E.
Discussion
40.

Which of the following is an example of fusion welding?
A. Atomic hydrogen welding
B. Flash welding
C. Seam welding
D. Spot welding
Answer» B. Flash welding
Discussion
41.

Which plastic materials contain strong cross linkings in their molecular structure?
A. Thermoplastic materials
B. Thermosetting materials
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
42.

The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece is
A. air
B. liquid
C. vacuum
D. any of the above medium
Answer» E.
Discussion
43.

Which of the following is a soft solder?
A. Copper-zinc alloy
B. Nickel-silver alloy
C. Lead-tin alloy
D. All of the above
Answer» D. All of the above
Discussion
44.

What is used as joining medium in brazing operation?
A. Copper-zinc alloy
B. Nickel-silver alloy
C. Lead-tin alloy
D. All of the above
Answer» B. Nickel-silver alloy
Discussion
45.

Which of the following characteristics does not affect the properties of plastics?
A. Their molecular structure
B. Their degree of polymerization
C. Both a. and b
D. None of the above
Answer» E.
Discussion
46.

Calculate time taken to face a workpiece of 100 mm diameter. The cross feed is 0.2 mm/rev and spindle speed is 200 r.p.m.
A. 10 min
B. 5 min
C. 2.5 min
D. 1.25 min
Answer» E.
Discussion
47.

Which casting process has no size and shape limits?
A. Sand casting
B. Shell-mould casting
C. Plaster-mould casting
D. none of the above
Answer» B. Shell-mould casting
Discussion
48.

Mass production means continuous production without loss of time.
A. True
B. False
Answer» B. False
Discussion
49.

Joint strength in brazing operation is
A. as high as in gas or arc welding
B. not as high as in gas or arc welding
C. higher than that of in gas or arc welding
D. unpredictable
Answer» C. higher than that of in gas or arc welding
Discussion
50.

Which characteristic of material is used in forging process?
A. characteristics of elasticity of material
B. characteristics of ductility of material
C. characteristics of plasticity of material
D. none of the above
Answer» D. none of the above
Discussion