NEIEP Mechanics Practice Exam

What type of wrench is specifically designed to thread pipes with polished surfaces?

1. Strap Wrench

2. Socket Wrench

3. Open-End Wrench

4. Pipe Wrench

The correct answer is: Strap Wrench

A strap wrench is specifically designed to grip and turn objects with polished surfaces, such as pipes, without damaging or scratching them. It features a looped strap that provides a firm yet gentle grip when tightened around the object being worked on. This makes it particularly useful in plumbing applications where preserving the integrity of a polished finish is essential. The strap allows for flexibility in gripping various shapes and sizes while minimizing the risk of marring the surface. The other types of wrenches mentioned are generally used for different applications. A socket wrench is used for turning fasteners like nuts and bolts but does not provide the gentle grip necessary for polished pipe surfaces. An open-end wrench, which has U-shaped openings at the ends to fit various sizes of fasteners, is also not suited for polished surfaces as it can easily leave marks. A pipe wrench, while designed for gripping pipes, has serrated teeth that can damage polished finishes, making it less ideal for this specific purpose.