Machine Design
Pitch point of a cam is

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

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Machine Design
Stress concentration is caused due to

Abrupt change of section
All of these
Pitting at points or areas at which loads on a member are applied
Variation in properties of material from point to point in a member

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