What does a torque wrench measure?

A torque wrench is a specialized tool designed specifically to measure the amount of torque, or rotational force, applied to a fastener such as a bolt or nut. This measurement is crucial in various mechanical and construction applications to ensure that fasteners are tightened to the manufacturer's specifications, which prevents over-tightening or under-tightening.

Using a torque wrench helps maintain the integrity of the connection being made, ensuring safety and performance in mechanical assemblies, such as in automotive, aerospace, and other engineering fields. The correct application of torque plays a key role in preventing component failure due to either insufficient clamping force or excessive stress on the materials.

In contrast, the other options do not pertain to the function of a torque wrench: measuring distance, hole depth, or weight entails other measuring tools and principles, making option B the only accurate choice regarding the function of a torque wrench.