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

Increases
Remains unchanged
Decreases
None of these

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Machine Design
In composite or reverse laid ropes

Wires in two adjacent strands are twisted in opposite direction
Direction of twist of wires and strands are same
Direction of twist of wires in strands is opposite to the direction of twist of strands
Wires are not twisted

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Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

New and old belts will cause vibrations
Only one belt cannot be fitted with other used belts
Belts are available in sets
The new belt will carry more than its share and result in short life

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