Backflow Prevention Practice Exam

If a reduced pressure principle assembly's field test shows a leaking shut-off valve 2, the leak may be compensated by obtaining water pressure/flow from ____?

1. A high-pressure gauge control valve

2. A low-pressure gauge control valve

3. Test cock number 1

4. Test cock number 2

The correct answer is: Test cock number 1

The correct answer is based on the design and function of the reduced pressure principle assembly. This type of assembly is used to protect the water supply from contamination by creating a physical barrier that prevents backflow when there is a drop in pressure or a reversal of flow. In the case of a leaking shut-off valve, particularly shut-off valve 2, utilizing test cock number 1 allows you to obtain a source of water pressure or flow that helps while performing the necessary test and troubleshooting. Test cock number 1 is strategically placed within the assembly to facilitate testing and ensure the assembly operates correctly, even when one part of the system may be compromised. When test cock number 1 is used, it allows for evaluation and the ability to obtain a reading that reflects the pressure needed despite the leak. This ensures that the assembly can still function and provides critical information to assess the integrity of the backflow prevention assembly. The other options do not provide the appropriate point of access for compensating for leaks during testing. Therefore, test cock number 1 stands out as the most suitable choice in this scenario for maintaining effective water pressure and flow during the assessment of the assembly's performance.