List of Common Mechanical Engineering Multiple Choice Questions (MCQ) and Answers

For campus placement, competitive exams or job interviews, mechanical engineering freshers should be well versed with several questions related to the important concepts of mechanical engineering. We have prepared a list of competitive MCQ for mechanical engineering students that will help you to cover important topics such as thermodynamics, machine design, engineering mechanics, strength of materials, and many more.

Start your preparation now with this list of questions:

Multiple Choice Questions & Answers (MCQ) for Mechanical Engineering

Q1: Thermal equilibrium indicates that the flow of steam is

A. polytropic
B. hyperbolic
C. isothermal
D. isentropic

Answer: D

Q2: If a square lamina is freely suspended from a corner, what is the angle made by its side with the horizontal?

A. 180^o
B. 90^o
C. 45^o
D. 0^o

Answer: C

Q3: If a steam pressure of 10 kg/cm2 needs to be measured, what should be the range of pressure gauge?

A. 0 to 20 kg kg/cm2
B. 10 kg/cm2 to + 10 kg kg/cm2
C. 0 to 100 kg kg/cm2
D. 5 to 11 kg kg/cm2

Answer: A

Q4: What is the common limitation of string law?

A. Valid when more than three particles are connected by a string
B. Direction of motion cannot be specified
C. Both a. and b
D. None of the above

Answer: B

Q5: S.I unit of work done is

A. Newton Meter
B. Joule
C. Both a. and b
D. None of the above

Answer: C

Q6: What is meant by application factor?

A. Ratio of maximum load and average load
B. Ratio of maximum torque and average torque
C. Both a. and b
D. None of the above

Answer: C

Q7: The value of 1 mm of Hg is equal to

A. 133.3 N/ m2
B. 1.333 N/ m2
C. 1333 N/ m2
D. 13.33 N/ m2

Answer: A

Q8: What is the formula if slenderness ratio Le / K <X, where X is equal to √ ( 2π ²E / Syc )?

A. J. B. Johnson formula
B. Euler’s formula
C. Rankine formula
D. None of the above

Answer: A

Q9: The material that has minimum gage factor is

A. Manganin
B. Monel
C. Constantan
D. None of these

Answer: A

Q10: The approximate nominal diameter for coarse threads is

A. d = 0.5 dc
B. d = 1.136 dc
C. d = 1.19 dc
D. d = 1.59 dc

Answer: C

Q 11: Formula to calculate shear strength of butt weld is

A. P = τ h2 l
B. P = τ h l
C. P = τ h l2
D. None of these

Answer: B

Q 12: Which of the following is correct?

A. Absolute pressure = Gauge pressure – Atmospheric pressure
B. Absolute pressure = Atmospheric pressure + Gauge pressure
C. Gauge pressure = Absolute pressure + Atmospheric pressure
D. Atmospheric pressure = Absolute pressure + Gauge pressure

Answer: B

Q 13: Which of the following gas has a minimum molecular mass?

A. Hydrogen
B. Nitrogen
C. Methane
D. Oxygen

Answer: A

Q 15: As per Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature), for a perfect gas

A. p/T = constant, if v is kept constant
B. p v = constant, if T is kept constant
C.T/p = constant, if v is kept constant
D. v/T = constant, if p is kept constant

Answer: B

Q 16: Transmission of heat by molecular collision is known as

A. Transmission
B. Conduction
C. Radiation
D. Convection

Answer: D

Q 17: One of the following cannot be the unit of thermal conductivity

A. cal/c,-sec?K
B. Watt / m2 K
C. BTU/ft-h?F
D. CHU/ft-hr?C

Answer: B

Q 18: What is the surface temperature of sun?

A. 6000 K
B. 2000 K
C. Infinitely large
D. 20000 K

Answer: D

Q 19: The power factor of a 3 phase induction motor near full load is expected to be around

A. 0.8 lagging
B. 0.1 lagging
C. 0.8 leading
D. 0.5 leading

Answer: A

Q 20. What is the number of elastic constants for a completely anisotropic elastic material that follows Hooke’s law?

A. 3
B. 25
C. 21
D. 4

Answer: C

Hope the above list of multiple choice questions (MCQ) for mechanical engineering students will help you prepare for your job interview.

Also Read: Common Mechanical Engineering Interview Questions to Crack Your Interview

Watch this space for more series of questions for your campus placement and job interviews.

All the best!

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