USCG Exam PracticeKnots, Bends, and Hitches
The Boatswain's Manual identifies polypropylene line as having a significant operational limitation compared to nylon. Which of the following correctly states that limitation?
- A. Polypropylene sinks when loaded, increasing the risk of propeller fouling.
- ✓ Polypropylene has lower strength than nylon and degrades under UV exposure.Correct
- C. Polypropylene loses approximately 10–15% of its strength when wet.
- D. Polypropylene has poor shock absorption and is unsuitable for dock lines.
Why B is correct
The Boatswain's Manual states that polypropylene has lower strength than nylon and breaks down under UV exposure. The 10–15% wet-strength loss applies to nylon, not polypropylene. Polypropylene floats rather than sinks.