Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Axial pitch
Diametral pitch
Normal pitch
Module

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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
Cold working

Has no influence on fatigue strength
Decreases the fatigue strength
Alone has no influence on fatigue strength
Increases the fatigue strength

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