Machine Design
If the centre distance of the mating gears having involute teeth is increased, then the pressure angle

Remains unchanged
Increases
Decreases
None of these

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Machine Design
A compound belt drive is used when

None of these
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions

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Machine Design
The flank of the tooth is the

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

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Machine Design
When the speed of belt increases,

The power transmitted will increase
The coefficient of friction between the belt and pulley increases
The power transmitted will decrease
The coefficient of friction between the belt and pulley decreases

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