Machine Design
The flank of the tooth is the

Surface of the tooth below the pitch surface
Surface of the top of the tooth
Width of the tooth measured along the pitch circle
Surface of the tooth above the pitch surface

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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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