What condition is caused by the tightening of a loop that is restrained from untwisting?

What condition is caused by the tightening of a loop that is restrained from untwisting?

• A. Birdcaging
• B. Twisting
• C. Kinking
• D. Fraying

Answer: (C)

When a loop is tightened and the twist inside it is restrained from untwisting, the torsional stress can’t dissipate and the rope is forced to form a sharp bend. That localized, abrupt bend is called a kink, and it weakens the rope because the strands bunch and concentrate stress at that point. Birdcaging involves strands buckling into a cage-like pattern from severe bending, not a locked-in twist causing a kink. Fraying is wear along the rope’s surface or at the end, and twisting refers to general rotational deformation, not the specific sharp bend produced by a locked-in twist.

When a loop is tightened and the twist inside it is restrained from untwisting, the torsional stress can’t dissipate and the rope is forced to form a sharp bend. That localized, abrupt bend is called a kink, and it weakens the rope because the strands bunch and concentrate stress at that point.

Birdcaging involves strands buckling into a cage-like pattern from severe bending, not a locked-in twist causing a kink. Fraying is wear along the rope’s surface or at the end, and twisting refers to general rotational deformation, not the specific sharp bend produced by a locked-in twist.