Machine Design
Cap screws are

Used to prevent relative motion between parts
Provided with detachable caps
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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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 core diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt

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