Design of Machine Elements MCQs
1. What is the primary purpose of a key in a shaft coupling?
A) To prevent axial movement
B) To transmit torque
C) To reduce friction
D) To align the shaft
2. Which material is commonly used for manufacturing gears?
A) Aluminum
B) Brass
C) Cast iron
D) Carbon steel
3. In a rolling contact bearing, the rolling element is usually made of:
A) Bronze
B) Brass
C) Hardened steel
D) Nylon
4. What is the function of a flywheel in an engine?
A) To store energy
B) To increase speed
C) To cool the engine
D) To reduce vibrations
5. Which type of failure occurs due to repeated cyclic stresses?
A) Wear
B) Creep
C) Fatigue
D) Corrosion
6. The efficiency of a self-locking screw is:
A) Less than 50%
B) More than 50%
C) Exactly 50%
D) None of the above
7. In which type of coupling, misalignment can be accommodated?
A) Rigid coupling
B) Flexible coupling
C) Sleeve coupling
D) Flange coupling
8. The endurance limit of a material is:
A) The maximum stress it can withstand without permanent deformation
B) The maximum stress it can withstand without failure
C) The stress at which it will fail after a large number of cycles
D) The stress at which it will fail under static loading
9. Which of the following is a non-destructive testing method?
A) Tensile test
B) Impact test
C) Ultrasonic test
D) Hardness test
10. What is the primary function of a clutch in an automotive vehicle?
A) To start the engine
B) To transmit power
C) To engage and disengage the engine from the transmission
D) To provide braking
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