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

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

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Machine Design
In hydrodynamic bearings

The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication
The oil film pressure is generated only by the rotation of the journal

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

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