Machine Design
When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.

Square
Parallel
Rectangular
None of these

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Machine Design
A compound belt drive is used when

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

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Machine Design
The fatigue stress concentration factor is defined as

All of these
The product of the endurance limits with and without stress concentration
The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
The ratio of endurance limit with stress concentration to the endurance limit without stress concentration

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