Backflow Prevention Practice Exam

What is the consequence of a fouled relief valve?

1. Increased system pressure

2. Intermittent water flow

3. Continuous discharge

4. Automatic closure of check valves

The correct answer is: Continuous discharge

A fouled relief valve can lead to continuous discharge because the valve is designed to release excess pressure in a plumbing system to prevent damage. When the relief valve is fouled, it may fail to seal properly. This failure can result in the valve remaining open, leading to continuous discharge of water or fluid from the system. Maintaining the functionality of a relief valve is crucial; if it cannot close due to fouling or blockage, it cannot perform its essential function of controlling system pressure, which is vital for the protection of the plumbing infrastructure as well as safe operation under varying conditions. In contrast, increased system pressure occurs when the relief valve does not open when it should, but this is not the primary consequence of a fouled valve itself. Intermittent water flow is indicative of other issues in the system, such as blockages or pressure changes, rather than a specific outcome of relief valve fouling. Automatic closure of check valves does not directly relate to the operation of a relief valve; check valves serve a different purpose, primarily preventing backflow, and their operation is not influenced by the state of the relief valve.