Machine Design
The valve rod in a steam engine is connected to an eccentric rod by

Bolted joint
Knuckle joint
Universal coupling
Cotter joint

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Machine Design
A bolt of uniform strength can be developed by

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

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