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

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

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Theory of Machine
Which of the following statement is correct for involute gears?

The variation in centre distance of shafts increases radial force.
The interference is inherently absent.
The pressure angle is constant throughout the teeth engagement.
A convex flank is always in contact with concave flank.

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to

Vector sum of radial component and Coriolis component
Vector sum of tangential component and Coriolis component
Vector sum of radial component and tangential component
Vector difference of radial component and tangential component

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