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
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Is minimum at zero speed and increases monotonically with increase in speed
Remains constant at all speeds
Is maximum at zero speed and decreases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed

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