Question

Angle of action of cam is defined as the angle

(a) of rotation of the cam for a definite displacement of the follower

(b) through which the cam rotates during the period in which the follower remains in the highest position

(c) moved by the cam from the instant the follower begins to rise, till it reaches its highest position

(d) moved by the cam from beginning of ascent to the termination of descent

This question was posed to me in an online quiz.

My query is from Classification of Cams topic in division Cams of Machine Dynamics

Answer 1

The correct option is (d) moved by the cam from beginning of ascent to the termination of descent

The explanation is: Angle of ascent of cam is defined as the angle moved by the cam from the instant the follower begins to rise, till it reaches its highest position. Angle of action of cam is defined as the angle moved by the cam from beginning of ascent to the termination of descent.