Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Soderberg relation
Gerber relation
None of these
Goodman relation

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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
Shafts are arranged parallel and rotate in the same directions
None of these
Shafts are arranged parallel and rotate in the opposite directions

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