Machine Design
A coupling used to connect two perfectly aligned shafts, is

All of these
Flange coupling
Muff coupling
Compression coupling

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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
Wires are not twisted
Direction of twist of wires in strands is opposite to the direction of twist of strands

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