Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

1.25 × diameter of bolt
0.75 × diameter of bolt
Diameter of bolt
1.5 × diameter of bolt

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Machine Design
A bolt of uniform strength can be developed by

Keeping the core diameter smaller than the diameter of the unthreaded portion
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

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