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

The assembly is functioning correctly under high supply pressure

Answer

The downstream demand is exceeding system capacity

Answer

The supply pressure is below the minimum operating pressure

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

Check valve #1 holds 6.0 psi differential

Answer

Check valve #2 holds 2.0 psi differential

Answer

The relief valve opens when zone pressure is 2.5 psi below supply pressure

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

Open the #1 shutoff valve and observe pressure at test cock #3

Answer

Remove and bench test check valve #2 separately

Answer

Pressurize the downstream side and measure the pressure drop across the assembly

Question 4

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

Accepted Answer

ASSE 1013

Answer

ASSE 1015

Answer

ASSE 1019

Answer

ASSE 1047

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

0.5 psi

Answer

2.0 psi

Answer

3.5 psi

Question 6

What does a 'bouncing' or oscillating needle on a differential pressure gauge indicate during a backflow field test?

Accepted Answer

Fluctuating or unstable supply pressure in the system

Answer

The check valve is holding properly under pressure

Answer

The test kit gauge is properly calibrated

Answer

A tight shutoff valve upstream of the assembly

Question 7

Which backflow prevention assembly type has a relief valve that vents the intermediate zone pressure to atmosphere when zone pressure rises to supply pressure?

Accepted Answer

Reduced Pressure Zone Assembly (RPZ)

Answer

Double Check Valve Assembly (DCVA)

Answer

Pressure Vacuum Breaker (PVB)

Answer

Spill-Resistant Vacuum Breaker (SVB)