USCG Exam PracticeMarlinespike seamanship — knots, splices, line care
In wire rope construction, a 6×19 regular-lay rope differs from a 6×19 lang-lay rope primarily in which characteristic relevant to shipboard use?
- A. Regular lay has a fiber core; lang lay always uses an independent-wire-rope core
- ✓ Regular lay wires run opposite to the strand lay, making it more resistant to kinking and easier to handle; lang lay wires run the same direction, making it more flexible and wear-resistant but prone to spin and unlayingCorrect
- C. Regular lay rope has greater flexibility over small-diameter sheaves than lang lay rope
- D. Lang lay rope is preferred for standing rigging because it resists crushing better than regular lay
Why B is correct
NAVEDTRA 14343 §8-1 defines regular lay as wires laid opposite to the strand direction — more resistant to kinking and crushing, easier to handle — and lang lay as wires running the same direction as the strands — more flexible and wear-resistant but prone to spin and unlaying under load. Core type and sheave flexibility are separate characteristics not linked to lay direction in the source.
Cited:NAVEDTRA 14343 §8-1