Theory of Machine
Idler pulley is used

For increasing velocity ratio
For changing the direction of motion of the belt
For applying tension
All of the listed here

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Angle of ascent of cam is defined as the angle

During which the follower returns to its initial position
Through which the cam rotates during the period in which the follower remains in highest position
Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

ANSWER DOWNLOAD EXAMIANS APP