Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Prep Guide

A torque wrench is specifically designed to apply a precise amount of torque to a fastener, such as a bolt or nut. This tool is crucial in ensuring that fasteners are tightened to the manufacturer's specifications, which helps prevent overtightening or undertightening. Achieving the correct torque is essential for maintaining the integrity of a mechanical assembly; if a fastener is overtightened, it can strip threads or break, while undertightening can lead to joint failure.

The other choices refer to different tools or functions not associated with a torque wrench. For instance, measuring rotational speed is generally done with a different kind of instrument, such as a tachometer. Loosening rusted bolts typically requires more force and might involve other tools, such as breakers or impact wrenches, rather than a torque wrench. Additionally, although a torque wrench can be used to tighten screws, it is not limited to this function, further distinguishing it from tools designed solely for that purpose.