Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (180°/T)
p = D sin (360°/T)
p = D sin (120°/T)
p = D sin (90°/T)

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Machine Design
In case of thick cylinders, the tangential stress across the thickness of cylinder is

Maximum at the inner surface and zero at the outer surface
Maximum at the outer surface and minimum at the inner surface
Maximum at the outer surface and zero at the inner surface
Maximum at the inner surface and minimum at the outer surface

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Machine Design
Stress concentration is caused due to

All of these
Pitting at points or areas at which loads on a member are applied
Abrupt change of section
Variation in properties of material from point to point in a member

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