Within composite or inversely laid wire ropes___________________?
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Answer: C. wires in two adjacent strands are twisted in opposite direction
Explanation
In composite wire ropes, the direction of twist of wires in strands is opposite to adjacent strands. This inverse twisting pattern helps balance internal torsional forces within the wire rope. Countering twist directions prevents the rope from unravelling or kinking under heavy tension. Wire ropes consist of multiple individual metal wires twisted together to form helical strands. Lay direction describes whether the strands are twisted to the right or left along the rope. Proper rope construction ensures flexibility, strength, and resistance to crushing wear.
Cranes, elevators, and rigging applications rely heavily on composite wire ropes for safety. Inspectors check wire ropes regularly for broken wires and untwisting to prevent accidents. Manufacturing wire ropes with balanced twist directions extends their operational service lifespan. Option A states wire twist opposes strand twist, which describes ordinary lay rather than adjacent strands. Option B claims wires and strands share identical twist directions, reducing internal stability. Option D states wires are not twisted, which would result in a bundle rather than a rope.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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