Which of the following is a correct ER value for a bowline?

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Multiple Choice

Which of the following is a correct ER value for a bowline?

ER value shows how much of the rope’s strength remains after tying the knot and loading it. For a bowline, knot efficiency is typically around the mid-60s, commonly cited as about 65%. So, if the rope’s breaking strength is 100 units, a bowline would preserve roughly 65 units of that strength under load. That’s why 65% is the best match among the options. The other values don’t align with how a bowline usually performs: 60% is a bit on the low side for this knot, 75% overstates its efficiency, and 90% would imply almost no loss of strength, which isn’t characteristic of bowline knots.

ER value shows how much of the rope’s strength remains after tying the knot and loading it. For a bowline, knot efficiency is typically around the mid-60s, commonly cited as about 65%. So, if the rope’s breaking strength is 100 units, a bowline would preserve roughly 65 units of that strength under load. That’s why 65% is the best match among the options.

The other values don’t align with how a bowline usually performs: 60% is a bit on the low side for this knot, 75% overstates its efficiency, and 90% would imply almost no loss of strength, which isn’t characteristic of bowline knots.

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