New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Which of the following is NOT a basic type of valve?

1. Relief

2. Globe

3. Ball

4. Check

The correct answer is: Ball

The correct choice, which identifies a type of valve that is indeed a basic type of valve, is based on the understanding of common valve classifications. Relief valves, globe valves, and check valves are all fundamental types of valves used in piping systems for specific functions. Relief valves are used to automatically release pressure from a system when it exceeds a predetermined limit, ensuring safety by preventing over-pressurization. Globe valves are designed primarily for throttling flow and controlling the flow rate. Their unique shape allows for this function, making them common in applications where flow adjustment is necessary. Check valves are utilized to prevent backflow in a system, allowing fluid to flow in one direction only. This is crucial in preventing system damage and maintaining operational integrity. In contrast, while ball valves are widely used and recognized for their ability to provide quick on-off control of flow, they are categorized differently from the options listed in the question's context of "basic types of valves." Understanding these classifications is essential for any pipe fitter, as it informs not only the selection of valves for specific applications but also how they are operated and maintained within a piping system.