Theory of Machine
The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

Rolling pair
Sliding pair
Turning pair
Spherical pair

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Theory of Machine
Cam angle is defined as the angle

During which the follower returns to its initial 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
Through which, the cam rotates during the period in which the follower remains in the highest position

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