Machine Design
An open belt drive is used when

Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the opposite directions

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Machine Design
Plastic flow in ductile materials

Lessens the seriousness of static loading stress concentration
Has no effect on it
Depends on other considerations
Increases the seriousness of static loading stress concentration

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Machine Design
Set screws are

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

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