Machine Design
When a belt drive is transmitting maximum power,

Effective tension is half of centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Driving tension on tight side is twice the centrifugal tension
Effective tension is equal to centrifugal tension

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Machine Design
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

It is subjected to a higher stress than the outer side
It is more stretched than the outer side during the manufacturing process
It has a lower curvature than the outer side
It is subjected to a higher cyclic loading than the outer side

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Machine Design
A tap bolt

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has pointed threads
Has a head on one end and a nut fitted to the other
Has both the ends threaded

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