Machine Design Mcq Questions and Answers

Published: 25 Nov 2025

1. The sleeve or muff coupling is designed as a
a) Hollow shaft
b) Gun cylinder
c) Thick cylinder
d) Solid shaft

2. The number of slots in a 25 mm castle nut is
a) 2
b) 4
c) 6
d) 8

3. Brittle coating technique is used for
a) Determining brittleness
b) Protecting metal against corrosion
c) Protecting metal against wear and tear
d) Experimental stress analysis

4. An automobile gear box has
a) Compound epicyclic gear train
b) Compound gear train
c) Epicyclic gear train
d) Simple gear train

5. Ball bearing type screws
a) Sliding friction is replaced by rolling friction
b) There is a ball bearing provided on the screwed shafts
c) Are self-locking
d) Friction is more

6. Spring stiffness is
a) Load carrying capacity of spring
b) Load per unit area of base
c) Load/cross-sectional area of spring
d) Load/unit deflection

7. A transmission shaft includes
a) Counter shaft
b) Line shaft
c) Overhead shaft
d) All of these

8. The arms of the pulleys for flat belt drive have
a) Elliptical cross-section
b) Major axis in plane of rotation
c) Major axis twice the minor axis
d) All the three characteristics

9. The rated life of a bearing varies
a) Directly as load
b) Inversely as cube of load
c) Inversely as square of load
d) Inversely as fourth power of load

10. The objective of idler pulley in belt drive is to
a) Decrease the tendency of belt to slip
b) Increase the power transmission capacity
c) Increase the wrap angle and belt tension
d) All the above objectives