Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

Diameter of bolt
0.75 × diameter of bolt
1.5 × diameter of bolt
1.25 × diameter of bolt

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Machine Design
When the belt is transmitting maximum power,

The tension in tight side is twice the centrifugal tension
The tension in tight side is thrice the centrifugal tension
The tension in slack side is equal to the centrifugal tension
None of these

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