Machine Design
The connecting rod bolts are tightened up so that tightening stress

Approaches yield point
Is about yield point divided by safety factor
Is just sufficient to hold parts together
Is 50% of yield point

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Machine Design
A fast and loose pulley 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 opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction

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Machine Design
A bolt of uniform strength can be developed by

Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
None of these
Keeping the core diameter smaller than the diameter of the unthreaded portion

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