Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2100 N-m
2000 N-m
2136 N-m
2050 N-m

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Machine Design
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

Have contact at the bottom most of the bearing
Move towards right of the bearing making the metal to metal contact
Move towards left of the bearing making metal to metal contact
Move towards right of the bearing making no metal to metal contact

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

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

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Machine Design
When a machine member is subjected to torsion, the torsional shear stress set up in the member is

Maximum at both the centroidal axis and outer surface of the member
Zero at both the centroidal axis and outer surface of the member
Zero at the centroidal axis and maximum at the outer surface of the member
Maximum at the centroidal axis and zero at the outer surface of the member

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