Mechanical Engineering:: Theory of machines

The wear of bearing is proportional to velocity and pressure.

A. Yes B. No

For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

A. sin φ B. cos φ
C. sec φ D. cosec φ

The cam follower generally used in automobile engines is

A. knife edge follower
B. fiat faced follower
C spherical faced follower
D. roller follower

A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

A. 1.4 N-s/m B. 18.52 N-s/m
C. 52.92 N-s/m D. 529.2 N-s/m

The gear train usually employed in clocks is a

A. simple gear train
B. reverted gear train
C sun and planet gear
D. differential gear

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