Machine Design
Auto frettage is the method of

Joining thick cylinders
Pre-stressing thick cylinders
Increasing the life of thick cylinders
Calculating stresses in thick cylinders

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Machine Design
In case of V belt drive

The belt should not touch the sides of groove in the pulley
The belt should touch the bottom of groove in the pulley
None of these
The belt should not touch the bottom of groove in the pulley

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