Which lifeline uses a nylon sheath braided over a nylon core?

Which lifeline uses a nylon sheath braided over a nylon core?

• A. KM III
• B. Static-Pro Lifeline
• C. CMC Lifeline
• D. Tag Line

Answer: (C)

Understanding rope construction helps here. A lifeline built as a nylon sheath braided over a nylon core is a classic kernmantle design where the core (kern) bears most of the strength and the outer braided sheath (mantle) protects the core and resists abrasion. The nylon-over-nylon combo gives predictable strength, handling, and abrasion characteristics, especially in rescue work where moisture and wear are factors. This exact nylon-on-nylon construction matches the CMC Lifeline, making it the best choice for the description. The other lifelines typically use different material combinations for the core or the sheath, so they don’t fit the description of a nylon sheath braided over a nylon core.

Understanding rope construction helps here. A lifeline built as a nylon sheath braided over a nylon core is a classic kernmantle design where the core (kern) bears most of the strength and the outer braided sheath (mantle) protects the core and resists abrasion. The nylon-over-nylon combo gives predictable strength, handling, and abrasion characteristics, especially in rescue work where moisture and wear are factors.

This exact nylon-on-nylon construction matches the CMC Lifeline, making it the best choice for the description. The other lifelines typically use different material combinations for the core or the sheath, so they don’t fit the description of a nylon sheath braided over a nylon core.