Machine Design
The objective of caulking in a riveted joint is to make the joint

Free from stress
Stronger in tension
Leak-proof
Free from corrosion

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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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