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

Normal pitch
Diametral pitch
Axial pitch
Module

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Machine Design
In case of V belt drive

The belt should not touch the sides of groove in the pulley
None of these
The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley

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