Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
All the three are designed for equal strength
Key is made the weakest
Key is made the strongest

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Machine Design
A compound belt drive is used when

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

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Machine Design
Form coefficient of spring is

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

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