Machine Design
A bolt

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has both the ends threaded
Is provided with pointed threads
Has a head on one end and a nut fitted to the other

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Machine Design
Pitch point of a cam is

A point on the pitch curve having minimum pressure angle
Any point on the pitch curve
Any point on the pitch circle
A point on the pitch curve having maximum pressure angle

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