Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Hollow saddle key
Flat saddle key
Feather key
Woodruff key

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Machine Design
A bolt of uniform strength can be developed by

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

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