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

Goodman relation
None of these
Soderberg relation
Gerber relation

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Machine Design
Cap screws are

Similar to small size tap bolts except that a greater variety of shapes of heads are available
Provided with detachable caps
Used to prevent relative motion between parts
Slotted for a screw driver and generally used with a nut

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