Machine Design
The centrifugal tension in belts

Decreases the power transmitted
Increases the belt tension without increasing power transmission
Increases the power transmitted
Increase the wrap angle

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Machine Design
In worm, gears, pitch lead angle is

The angle between the tangent to the pitch helix and the plane of rotation
The angle between the tangent to the pitch helix and an element of the cylinder
Half the angle between two inclined faces in axial plane
None of these

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