Machine Design
A woodruff key is

Capable of tilting in a recess milled out in the shaft
A tapered key with head at one end
All of these
Fitted in pairs at right angles

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Machine Design
In composite or reverse laid ropes

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

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