Machine Design
For a square key made of mild steel, the shear and crushing strength are related as

Shear strength is less than crushing strength
Shear strength is greater than crushing strength
Shear strength is equal to crushing strength
None of these

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Machine Design
A bolt of uniform strength can be developed by

None of these
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

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