What is the ER of a square knot?

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Multiple Choice

What is the ER of a square knot?

The main idea is understanding Efficiency Rating (ER), which is how much of the rope’s original breaking strength is preserved when the knot is tied and under load. A square knot tends to reduce strength due to how its strands press together, and standard tests show it retains about 60% of the rope’s strength. So the ER is 60%. For context, this means if the rope could hold 1000 pounds, the knot would fail around 600 pounds under a fair load on both ends. The square knot isn’t ideal for critical loads because its strength isn’t as high as some other knots, and it can slip or capsize under certain loading conditions.

The main idea is understanding Efficiency Rating (ER), which is how much of the rope’s original breaking strength is preserved when the knot is tied and under load. A square knot tends to reduce strength due to how its strands press together, and standard tests show it retains about 60% of the rope’s strength. So the ER is 60%. For context, this means if the rope could hold 1000 pounds, the knot would fail around 600 pounds under a fair load on both ends. The square knot isn’t ideal for critical loads because its strength isn’t as high as some other knots, and it can slip or capsize under certain loading conditions.

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