Machine Design
Stress concentration in cyclic loading is more serious in

Equally serious in both cases
Brittle materials
Ductile materials
Depends on other factors

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Machine Design
Cap screws are

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

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