Which knot provides mechanical advantage when tightening?

• A. Trucker's hitch
• B. Nip
• C. Crown splice
• D. Lang-lay ropes

Answer: (A)

The idea being tested is that a knot can multiply the force you apply to tighten a load. The trucker’s hitch does this by using a setup that creates a built‑in pulley effect: you anchor or loop the rope around the load, route the free end back through a hitch on the standing part, and then pull. That arrangement lets a relatively small pull generate a much larger tension along the line that’s securing the load, making tightening easier. Once you’ve achieved the desired tension, you secure the hitch so the load stays tight.

The other options don’t provide this leverage. A nip is a friction grip used to hold a rope in place but doesn’t multiply your pull. A crown splice is a method for joining rope ends, not for tightening. Lang-lay refers to a rope’s construction, not a knot or technique for tightening.