BAT Backflow Assembly Field Testing Procedures 2

Question 1

During normal operation, a dripping relief valve on an RPZ assembly most likely indicates:

Accepted Answer

Check valve #1 is failing to maintain adequate differential pressure

Answer

A dripping relief valve during normal operation typically means check valve #1 is fouled or not seating, causing zone pressure to rise until the relief valve cracks open.

Question 2

Which condition would cause an RPZ assembly to FAIL a field test?

Accepted Answer

The relief valve fails to open when zone pressure equals supply pressure

Answer

The relief valve must open when zone pressure equals supply pressure; failure to open means the assembly cannot provide backpressure backflow protection.

Question 3

To test check valve #2 on a Double Check Valve Assembly, the correct procedure is to:

Accepted Answer

Close the #2 shutoff valve, bleed downstream pressure, then measure differential across check valve #2 via test cocks #2 and #3

Answer

Closing the #2 shutoff valve, bleeding off downstream pressure, then reading the differential across test cocks #2 and #3 isolates and measures check valve #2's holding capacity.

Question 4

Which ASSE standard governs the performance and testing requirements for RPZ assemblies?

Accepted Answer

ASSE 1013

Answer

ASSE 1013 covers Reduced Pressure Principle Backflow Preventers, establishing performance requirements including those used in field testing evaluation.

Question 5

At what minimum differential pressure should the air inlet valve on a Pressure Vacuum Breaker (PVB) open during a field test?

Accepted Answer

1.0 psi

Answer

Per ASSE 1020, the air inlet valve on a PVB must open at a differential of at least 1.0 psi to admit air and break a potential siphon.

(BAT) Backflow Assembly Tester Certification Practice Test

(BAT) Backflow Assembly Tester Certification Practice Test

BAT Backflow Assembly Field Testing Procedures 2