Theory of Machine
To connect two parallel and coplanar shafts the following type of gearing is used

Spur gear
None of the listed here
Bevel gear
Spiral gear

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Theory of Machine
Cam angle is defined as the angle

During which the follower returns to its initial position
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
Of rotation of the cam for a definite displacement of the follower

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