Machine Design
Surface endurance limit of gear material is dependent upon its

Yield strength
Elastic strength
Toughness
Brinell hardness number

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Machine Design
Cap screws are

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
Provided with detachable caps

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Machine Design
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

All of these
The effect of curvature of the cylinder wall is neglected
The tensile stresses are uniformly distributed over the section of the walls
The effect of the restraining action of the heads at the end of the pressure vessel is neglected

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