Machine Design
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

Initial tension or external load, whichever is greater
Sum of the initial tension and external load applied
External load applied
Initial tension

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Machine Design
An open belt drive is used when

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

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