Machine Design
Form coefficient of spring is

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

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Machine Design
A compound belt drive is used when

None of these
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction

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