Machine Design
The endurance limit of a material with finished surface in comparison to rough surface is

More
More or less depending on quantum of load
Same
Less

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Machine Design
In cross or regular lay ropes

Wires are not twisted
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

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