Machine Design
Pitch point of a cam is

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

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Machine Design
Crowning on pulley helps

In increasing the slip of the belt
In decreasing the slip of the belt
To increase pulley life
To keep the belt in centre on a pulley while it is in motion

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