Which statement about the power pole rope is true?

• A. It is static
• B. It is dynamic kernmantle
• C. It is a cotton rope
• D. It is a nylon strap

Answer: (B)

Rope behavior under load and how it’s built determine why it’s used for power pole work. A dynamic kernmantle rope stretches when loaded, which helps absorb energy and lowers peak forces during a fall or sudden weight shift. The kernmantle construction—an inner core (kern) that carries most of the load, wrapped in a protective outer sheath (mantle)—gives both strength and controlled elongation, plus durability against abrasion. That combination is ideal for activities where shocks or falls might occur.

A static rope would not stretch much, so it would transmit more force to you and the anchors, increasing injury risk. Cotton rope isn’t suitable either: it absorbs moisture, degrades with use, and has unreliable strength compared to synthetic climbing ropes. A nylon strap or webbing is a flat, non-stretch material used for slings and attachment points, not as a rope for dynamic loading, and it lacks the inner-core/outer-sheath construction and stretch.

So describing the power pole rope as dynamic kernmantle captures both its construction and its energy-absorbing behavior, making it the correct characterization.