Cross Connection Practice Exam

Which method may be used to compensate for a leaking number two shutoff valve during a field test of a Reduced Pressure Principle Backflow Assembly?

1. Installing an additional check valve

2. Attaching a temporary bypass hose from test cock #1 to test cock #4

3. Replacing the shutoff valve

4. Using a pressure regulator

The correct answer is: Attaching a temporary bypass hose from test cock #1 to test cock #4

Attaching a temporary bypass hose from test cock #1 to test cock #4 is an effective method to compensate for a leaking number two shutoff valve during a field test of a Reduced Pressure Principle Backflow Assembly. This approach allows the water flow to bypass the faulty shutoff valve, ensuring that the test can still be conducted without interruption. In a Reduced Pressure Principle Backflow Assembly, the operation relies on maintaining a pressure differential to prevent backflow. If the number two shutoff valve is leaking, it could interfere with the accurate assessment of the assembly's function. By using a bypass hose, the tester can effectively isolate the leaking valve and maintain the necessary pressure conditions for the test. Using this method ensures that the testing process continues smoothly while still addressing the issue of the faulty valve. It allows the technician to gather accurate test results, which is crucial for determining whether the backflow preventer is functioning as intended. This is particularly important in maintaining public health standards and protecting the drinking water supply.