BAT Troubleshooting & Diagnostics 2

Question 1

During a field test of a double check valve assembly (DCVA), the #1 check valve shows a differential pressure reading of 0.8 psi. What does this indicate?

Accepted Answer

The check valve has failed and must be repaired or replaced

Answer

A differential pressure below 1.0 psi across a check valve in a DCVA indicates the check valve has failed and cannot hold the required minimum pressure.

Question 2

A reduced pressure principle assembly (RPBA) is found with the relief valve discharging continuously during normal system operation. What is the MOST likely cause?

Accepted Answer

The #2 check valve is fouled or failed, allowing backpressure to exceed zone pressure

Answer

Continuous relief valve discharge typically indicates a failed or fouled #2 check valve allowing downstream pressure to rise and compress the zone pressure above the relief valve opening point.

Question 3

When testing a pressure vacuum breaker (PVB), the air inlet valve fails to open at 1.0 psi differential. What should the tester do?

Accepted Answer

Record the assembly as failed and require repair or replacement

Answer

If the air inlet valve does not open at 1.0 psi differential, the PVB has failed the test and must be repaired or replaced per certification standards.

Question 4

A tester notices that test cock #4 of an RPBA is dripping during a test. What is the correct action?

Accepted Answer

Stop the test and repair the test cock before proceeding

Answer

A leaking test cock can compromise test accuracy and introduce contamination risk, so it must be repaired before completing the field test.

Question 5

During an RPBA test, the tester opens test cock #2 and the gauge reads the same pressure as supply. What does this most likely indicate?

Accepted Answer

The shutoff valve #1 is leaking by

Answer

If TC #2 reads supply pressure, it suggests shutoff valve #1 is not fully closed and is allowing supply pressure to bleed through into the test setup.

(BAT) Backflow Assembly Tester Certification Practice Test

(BAT) Backflow Assembly Tester Certification Practice Test

BAT Troubleshooting & Diagnostics 2