Machine Design
Which of the following screw thread is adopted for power transmission in either direction?

Square threads
Multiple threads
Acme threads
Buttress threads

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Machine Design
When a belt drive is transmitting maximum power,

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

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