Explore topic-wise MCQs in Mechanical Engineering Questions.

This section includes 56 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.

What is the byproduct formed by the condensation of methyl alcohol and acetic acid to form ester?
A. water
B. hydrogen
C. oxygen
D. none of the above
Answer» B. hydrogen
Discussion
2.

Which among the following is the characteristics of polymers?
A. High tensile strength
B. High coefficient of friction
C. Low density
D. All of these
Answer» D. All of these
Discussion
3.

What happens when thermosetting polymers are heated?
A. They become soft
B. They are deformed
C. They become rigid
D. All of the above
Answer» D. All of the above
Discussion
4.

What is meant work hardening process?
A. Ductile materials are deformed plastically at temperatures below crystalline temperatures which increases strength and hardness of the material
B. Ductile materials are deformed plastically at temperatures above crystalline temperatures which increases strength and hardness of the material
C. Ductile materials are deformed plastically at crystalline temperatures which increases strength and hardness of the material
D. None of the above
Answer» B. Ductile materials are deformed plastically at temperatures above crystalline temperatures which increases strength and hardness of the material
Discussion
5.

How is Ester produced?
A. Addition polymerization
B. Condensation polymerization
C. Substitutional polymerization
D. None of these
Answer» C. Substitutional polymerization
Discussion
6.

What are thermoplastics?
A. They are nonlinear polymers, in which rise in temperature increases plasticity
B. They are linear polymers, in which rise in temperature increases plasticity
C. They are linear polymers, in which temperature rise has no effect on plasticity
D. None of the above
Answer» C. They are linear polymers, in which temperature rise has no effect on plasticity
Discussion
7.

In which type of point defect, positive and negative ions are missing from the crystal?
A. Vacancy defect
B. Interstitial defect
C. Schottky defect
D. Substitutional defect
Answer» D. Substitutional defect
Discussion
8.

Body centered cubic structure has an atomic packing factor equal to
A. 0.74
B. 0.68
C. 0.52
D. None of the above
Answer» C. 0.52
Discussion
9.

Why are internal stresses not produced in hot working process?
A. Micro structures undergo distortion
B. Hot working process do not undergo recrystallization
C. Hot working process undergo recrystallization
D. None of the above
Answer» D. None of the above
Discussion
10.

What is meant by Frenkel defect?
A. defect in which interstitial position is occupied by missing atoms
B. defect in which positive and negative ions are missing
C. defect in which interstitial position is occupied by extra atom in the crystal without disorganizing the parent atom
D. none of the above
Answer» B. defect in which positive and negative ions are missing
Discussion
11.

Which among the following is not a type of Non-destructive testing?
A. compression test
B. visual testing
C. ultrasonic testing
D. eddy current testing
Answer» B. visual testing
Discussion
12.

Identify the type of destructive testing
A. Radiographic test
B. Dye penetrant test
C. Creep test
D. All of the above
Answer» D. All of the above
Discussion
13.

Which of the following statements is/are true for cold working process? 1. Cold working process does not provide good surface finish 2. Cold working process produces internal stress in a metal 3. Fatigue strength of metals can be improved 4. Cold working process cannot take place below recrystallization temperature
A. statement 1 and statement 2
B. statement 2 and statement 3
C. statement 3 and statement 4
D. all the above statements are true
Answer» C. statement 3 and statement 4
Discussion
14.

Which type of materials are used as bridges between human tissues and metals?
A. Polymeric biomaterials
B. Ceramic biomaterials
C. Metallic biomaterials
D. All of these
Answer» D. All of these
Discussion
15.

Which of the following statements is/are true for ultrasonic test?
A. Equipment used for ultrasonic testing is portable
B. Complicated shapes can be easily scanned
C. Waves generated are health hazardous
D. All the above statements are true
Answer» B. Complicated shapes can be easily scanned
Discussion
16.

Which among the following is the last step in magnetic particle test method?
A. observation and inspection
B. circular magnetization
C. demagnetization
D. magnetization
Answer» D. magnetization
Discussion
17.

When are the slip lines observed?
A. after plastic deformation
B. before plastic deformation
C. after mechanical working
D. after annealing
Answer» B. before plastic deformation
Discussion
18.

When magnetic field is removed, which type of materials maintain magnetic properties?
A. Ferromagnetic materials
B. Diamagnetic materials
C. Paramagnetic materials
D. All of the above
Answer» B. Diamagnetic materials
Discussion
19.

Which type of materials exhibit magnetism only in presence of an electric field?
A. Diamagnetic materials
B. Paramagnetic materials
C. Ferromagnetic materials
D. None of the above
Answer» C. Ferromagnetic materials
Discussion
20.

The materials are continuously magnetized throughout the operation in
A. DC applications
B. AC applications
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
21.

Which among the following rubbers are used for automobile tyres?
A. Only Polyurethane rubbers
B. Only Butadiene rubbers
C. Both Polyurethane and Butadiene are used
D. None of these
Answer» D. None of these
Discussion
22.

Which among the following is a type of destructive test?
A. Magnetic particle test
B. Cupping test
C. Dye penetrant
D. All of the above
Answer» C. Dye penetrant
Discussion
23.

Which type of composite materials the sandwich panels are?
A. Structural
B. Fiber reinforced
C. Particle reinforced
D. None of the above
Answer» B. Fiber reinforced
Discussion
24.

Before compacting the metals, which process is annealed to remove the effects of cold working?
A. Machining
B. Crushing
C. Shotting
D. All of these
Answer» D. All of these
Discussion
25.

Which materials can be used to manufacture elastomers?
A. Limestone
B. Petroleum
C. Alcohol
D. All of the above
Answer» E.
Discussion
26.

Which of the following statements is true for green density?
A. Green density increases when particle strength increases
B. Green density decreases when compacting speed decreases
C. Green density increases when compaction pressure increases
D. Green density decreases when apparent density increases
Answer» D. Green density decreases when apparent density increases
Discussion
27.

Which among the following is a paramagnetic material?
A. Iron
B. Cobalt
C. Nickel
D. Aluminum
Answer» E.
Discussion
28.

Non-destructive testing is used to determine
A. location of defects
B. chemical composition
C. corrosion of metal
D. All of these
Answer» E.
Discussion
29.

What is meant by resilience in stress strain curve?
A. area in the plastic region
B. area in the elastic region
C. area in elastic and plastic region
D. none of the above
Answer» C. area in elastic and plastic region
Discussion
30.

In physico - chemical processes, which factors affect reduction method?
A. Size of particles
B. Shape of materials
C. Reducing agent
D. All of the above
Answer» E.
Discussion
31.

At critical speed of rotation, ball mill rotates at
A. high speed
B. low speed
C. neither slow nor very high speed
D. none of the above
Answer» D. none of the above
Discussion
32.

What is meant by atomization?
A. Process of disintegrating molten metal into small particles by use of compressed air
B. Process of fusing small particles of metals into molten mass by water
C. Both A & B
D. None of the above
Answer» B. Process of fusing small particles of metals into molten mass by water
Discussion
33.

Which process is used to remove internal stresses from a metal?
A. Annealing
B. Cold working
C. Both a. and b.
D. None of the above
Answer» B. Cold working
Discussion
34.

Different conditions favoring electro deposition are
A. low current density
B. high temperature
C. high viscosity
D. All of these
Answer» D. All of these
Discussion
35.

Select the correct option which shows mechanical property of ceramic materials?

A. Non-crystalline ceramics become brittle below recrystallization temperature
B. At high temperatures ceramics have favorable properties
C. Ceramic products are resistant to oxidation
D. Ceramics can be used as a moderator
Answer» B. At high temperatures ceramics have favorable properties
Discussion
36.

What causes transformation of deformed martensite into austenite phase?
A. Heating
B. Cooling
C. both a. and b.
D. all of the above
Answer» B. Cooling
Discussion
37.

What is meant by Nil Ductility Transition Temperature (NDT)?
A. Metal gets transformed from brittle to ductile phase
B. Metal gets transformed from ductile to brittle phase
C. Metal gets transformed from malleable to ductile phase
D. Metal gets transformed from elastic to ductile phase
Answer» C. Metal gets transformed from malleable to ductile phase
Discussion
38.

Biosensors are used in
A. medical field
B. agricultural field
C. pollution monitoring
D. all of the above
Answer» E.
Discussion
39.

What is the effect of high temperatures on material properties?
A. loss of cohesive strength
B. increase in stiffness
C. increase in hardness
D. All of the above
Answer» B. increase in stiffness
Discussion
40.

What is meant by low angle boundary?
A. Low angle boundary represents a boundary between crystalline region and its surroundings
B. Low angle boundary is a surface defect which has angular misorientation between the grains
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
41.

What is meant by malleability?
A. Metals undergo plastic deformation under compressive stresses
B. Metals can be drawn into wires
C. Both a. and b.
D. None of the above
Answer» B. Metals can be drawn into wires
Discussion
42.

What is meant by ductility?
A. Metals can be drawn into sheets
B. Metals undergo elastic deformation under tensile loads
C. Metals undergo plastic deformation under tensile loads
D. All of the above
Answer» D. All of the above
Discussion
43.

What is the effect of temperature on stiffness of a metal?
A. Temperature has no effect on stiffness of a metal
B. As temperature increases stiffness of metal decreases
C. As temperature increases stiffness of metal increases
D. None of the above
Answer» C. As temperature increases stiffness of metal increases
Discussion
44.

Eddy current test is used to detect
A. cracks
B. hardness
C. conductivity
D. All of the above
Answer» E.
Discussion
45.

Erichsen cupping test is known as
A. creep test
B. torsion test
C. fatigue test
D. formability test
Answer» E.
Discussion
46.

Which of the following statements is/are true?
A. In tensile specimens necking is observed in brittle fractures
B. Cup and cone formation characterizes ductile fractures
C. Stress in brittle fractures increases during cracking
D. All the above
Answer» C. Stress in brittle fractures increases during cracking
Discussion
47.

During radiography test, which region absorbs less radiation and transmits more?
A. Low and high density regions absorb and transmit same amount of radiation
B. High density region
C. Low density region
D. None of the above
Answer» D. None of the above
Discussion
48.

Which test is used to determine dimensions of any object?
A. Ultrasonic test
B. Torsion test
C. Eddy current test
D. All of these tests can be used to determine dimensions of any object
Answer» D. All of these tests can be used to determine dimensions of any object
Discussion
49.

Which type of microscope is used to determine particle diameter between (10 to 0.001 μ)?
A. Optical microscope
B. Electron microscope
C. Both a. and b.
D. None of the above
Answer» C. Both a. and b.
Discussion
50.

Which test can be performed without skilled labour?
A. Dye penetrant testing
B. Visual testing
C. Ultrasonic testing
D. Magnetic particle test
Answer» B. Visual testing
Discussion