Machine Design
When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.

Parallel
Square
None of these
Rectangular

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Machine Design
The flank of the tooth is the

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

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Machine Design
Crowning on pulley helps

To keep the belt in centre on a pulley while it is in motion
To increase pulley life
In increasing the slip of the belt
In decreasing the slip of the belt

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Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Crossed belt drive transmits more power than open belt drive
Power transmission does not depend upon open and crossed types of constructions
Open and crossed belt drives transmit same power
Open belt drive transmits more power than crossed belt drive

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