Machine Design
Buttress threads are usually found on

Screw cutting lathes
Spindles of bench vices
Railway carriage couplings
Feed mechanisms

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Machine Design
When the belt is transmitting maximum power,

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

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