Intro to Millwright Practice Exam

Which tool is primarily used for loosening or tightening nuts and bolts?

1. Chisel

2. Pliers

3. Wrench

4. Hammer

The correct answer is: Wrench

The correct answer is the wrench, as it is specifically designed to fit onto the heads of nuts and bolts, allowing for the application of torque necessary to either tighten or loosen them. The wrench comes in various types, such as adjustable, socket, combination, and torque wrenches, each suited for different applications depending on the size and type of fasteners used. In contrast, while pliers can grip and turn nuts and bolts, they may not provide the same level of torque or precision as a wrench, especially with larger fasteners. Chisels are typically used for cutting or shaping materials and would not be appropriate for loosening or tightening fasteners. Hammers can drive or remove components but are not designed to tighten or loosen nuts and bolts effectively. Thus, the wrench stands out as the most suitable tool for handling this specific task in mechanical work.