Which of the following is NOT a characteristic of torsion in rods and cylinders?

The correct answer highlights that "warp under load" is not a characteristic of torsion in rods and cylinders. When a rod or cylinder is subjected to torsion, it is expected to maintain its structural integrity under the applied twisting load. While some materials may exhibit warping or deformation under certain conditions, well-designed and properly manufactured rods and cylinders generally resist such warping during torsional loads.

When it comes to torsion, these structures are specifically engineered to handle twisting forces effectively. They resist twisting while experiencing shear stress along the length of the material. The presence of shear stress indicates that the material is responding to the applied torque, but in well-constructed rods and cylinders, these stresses do not typically compromise the overall shape and function of the component. Thus, maintaining their shape is an essential behavior in their design under torsional loads, making the characteristic of warping not applicable in this context.