Which of the following is NOT a type of plumbing tool?

The correct answer is that a file is not considered a typical plumbing tool. In plumbing, the primary tools are often those specifically designed for working with pipes, fittings, and joints. A wrench is essential for tightening and loosening nuts and bolts, enabling proper assembly and disassembly of plumbing fixtures. A pipe cutter is specifically designed for cleanly cutting pipes to the desired length without causing damage or deformation, which is crucial for an effective plumbing installation or repair. A drill, while often used in various construction tasks, can also play a role in plumbing when installing fixtures that require drilling into walls or other surfaces to secure pipe brackets or anchors.

On the other hand, a file is more of a general-purpose tool used primarily in metalworking or woodworking for shaping or smoothing surfaces. Although it may have some applications in plumbing, such as deburring sharp edges on metal pipes, it is not categorized as a core plumbing tool. This distinction highlights the specific functions of tools within the context of plumbing tasks.