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

The wrench is essential for tightening bolts and nuts because it is specifically designed to grip and turn fasteners. Wrenches come in various types—including adjustable, socket, and open-end varieties—each suited to different sizes and shapes of nuts and bolts. The design of a wrench allows for a significant amount of torque to be applied, making it effective for securing fasteners tightly.

Screwdrivers, while useful for fastening screws, do not have the capability to handle bolts or nuts effectively due to their shape and intended design. Pliers can grip and twist, but they lack the precise fit needed for many bolts and nuts, which can lead to slippage and potential damage. A torque meter, also known as a torque wrench, is used to measure the amount of torque being applied; while it can be essential for precision applications, it doesn’t directly tighten bolts or nuts on its own. Therefore, the wrench is the most appropriate tool for the job of securely tightening bolts and nuts.