Machine Design
In case of V belt drive

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

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Machine Design
Form coefficient of spring is

Ratio of coil diameter to wire diameter
Its capability of storing energy
Concerned with strength of wire of spring
Load required to produce unit deflection

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