Machine Design
The building up of worn and undersized parts, subjected to repeated loads by electroplating is

Cheapest method
Has no effect as regards fatigue strength
Extremely hazardous
Best method

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Machine Design
The shear stress at a point in a shaft subjected to a torque is

Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
Directly proportional to the polar moment of inertia and to the distance of the point from the axis
Directly proportional to the applied torque and the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia

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