BAT Backflow Assembly Tester Evaluation & Troubleshooting 2

Question 1

During a RP assembly test, the differential pressure across check valve #1 drops below the minimum threshold. What is the correct next step?

Accepted Answer

Record the assembly as failed and tag it for repair

Answer

If check valve #1 fails to hold the minimum required differential, the assembly must be recorded as failed and removed from service for repair.

Question 2

What condition is indicated when the middle chamber bleed-off of an RP backpressure reads HIGHER than supply pressure during testing?

Accepted Answer

Backpressure is being applied from the downstream side

Answer

A middle chamber pressure exceeding supply pressure indicates downstream backpressure is entering the zone through a failed check valve #2.

Question 3

When testing a Double Check Valve Assembly (DCVA), the tester finds that check valve #2 holds but check valve #1 leaks at 0.5 psi. What is the correct disposition?

Accepted Answer

Fail — both check valves must independently meet minimum hold pressure

Answer

Each check valve in a DCVA must independently hold a minimum differential pressure (typically 1.0 psi); a failure of either check requires the assembly to fail.

Question 4

A reduced pressure (RP) assembly's relief valve opens during normal flow conditions when no backflow condition exists. What is the most likely cause?

Accepted Answer

The relief valve seat is worn or debris-fouled, causing premature opening

Answer

A worn or debris-fouled relief valve seat allows water to weep or open under normal pressure differentials, causing continuous or intermittent discharge.

Question 5

What is the minimum differential pressure an RP assembly's check valve #1 must hold during a field test per the USC FCCCHR standard?

Accepted Answer

5.0 psi

Answer

USC FCCCHR requires RP check valve #1 to maintain a minimum of 5.0 psi differential pressure to pass field testing.

(BAT) Backflow Assembly Tester Certification Practice Test

(BAT) Backflow Assembly Tester Certification Practice Test

BAT Backflow Assembly Tester Evaluation & Troubleshooting 2