Cross Connection Practice Exam

During the test of a check valve on a Pressure Vacuum Breaker Assembly, water that continually flows from the open test cock #2 indicates what?

1. A faulty check valve

2. A leaking #1 shutoff valve

3. A blocked air inlet

4. A working assembly

The correct answer is: A leaking #1 shutoff valve

Water that continually flows from the open test cock #2 during the test of a check valve on a Pressure Vacuum Breaker Assembly indicates a leaking #1 shutoff valve. In a functional Pressure Vacuum Breaker Assembly, when the check valve operates correctly and the shutoff valves are closed, the test cock should not leak. If water continuously flows from test cock #2, it suggests that there is an issue preventing proper closure. Specifically, a leaking shutoff valve at #1 would allow water to flow through the system, indicating that it's not maintaining the desired seal. This leakage can compromise the integrity of the system, potentially leading to backflow or contamination of the water supply. In contrast, if the assembly were functioning correctly, water would not be observed flowing from the test cock. A faulty check valve or a blocked air inlet could indeed cause issues, but they would manifest differently and not directly give the same indication as a leaking shutoff valve.