BACKFLOW PREVENTION ASSEMBLY
TESTER TRAINING QUESTIONS WITH
PROVEN ANSWERS
Are AVB'S approved for continuous use? ANSW✅✅No - no more than 12 hours in a 24 hour
period
What does SVB stand for? ANSW✅✅Spill Proof Vacuum Breaker
What does HVB stand for? ANSW✅✅Hose Type Vacuum Breaker (non-testable)
Can thermal expansion cause backpressure? ANSW✅✅Yes
Test kit gage faces read what PSID range? ANSW✅✅0-15 PSID
How often do test kits have to be calibrated? ANSW✅✅Minimum annually
The relief valve on a RP must open at a minimum PSID of _____ ANSW✅✅2.0 PSID
Check valve #1 on a RP should hold a minimum PSID of _____ ANSW✅✅Relief valve + 3.0 PSID
Check valve #2 on a RP should hold against backpressure and a minimum PSID of _____
ANSW✅✅1.0 PSID
RPDA and DCDA detect what? ANSW✅✅Low flows on lines that should not have flow indicating
illegal taps or leaks
Why do we flush test cocks in the order "4, 3, 2, 1" on a RP? ANSW✅✅To prevent it from
dumping
, The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping stops. What does that indicate? ANSW✅✅You have a leaking check valve #2
under a backpressure condition
The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping does not stop. You then open test cock #4 to induce flow across the device and the
dripping lets up or stops. What does that indicate? ANSW✅✅You have a leaking check valve #1
The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping does not stop. You then open test cock #4 to induce flow across the device and the
dripping does not stop. What does that indicate? ANSW✅✅You most likely have an issue with the
relief valve. It could potentially be an issue with both check valve #1 and the relief valve
The RV on a RP drips steadily while the customer is using water. What does this indicate?
ANSW✅✅The RV leaks and/or the diaphragm is damaged
Check valve #1 on a DC assembly must hold a minimum PSID of _____ ANSW✅✅1.0 PSID
Check valve #2 on a DC assembly must hold a minimum PSID of _____ ANSW✅✅1.0 PSID
The maximum allowed pressure drop across a DC assembly according to AWWA is _____
ANSW✅✅10 PSI
When testing for the PSID across check valve #1 on a DC assembly, the sight tube on test cock #3
does not stop flowing. What does that indicate? ANSW✅✅Leaking shut off valve #1
When testing for the PSID across check valve #2 on a DC assembly, water recedes from the sight
tube on test cock #4. What does that indicate? ANSW✅✅Leaking shut off valve #2
The check valve on a PVB must close at _____ PSID ANSW✅✅1.0 PSID
The air inlet valve on a PVB must open at _____ PSID ANSW✅✅1.0 PSID
TESTER TRAINING QUESTIONS WITH
PROVEN ANSWERS
Are AVB'S approved for continuous use? ANSW✅✅No - no more than 12 hours in a 24 hour
period
What does SVB stand for? ANSW✅✅Spill Proof Vacuum Breaker
What does HVB stand for? ANSW✅✅Hose Type Vacuum Breaker (non-testable)
Can thermal expansion cause backpressure? ANSW✅✅Yes
Test kit gage faces read what PSID range? ANSW✅✅0-15 PSID
How often do test kits have to be calibrated? ANSW✅✅Minimum annually
The relief valve on a RP must open at a minimum PSID of _____ ANSW✅✅2.0 PSID
Check valve #1 on a RP should hold a minimum PSID of _____ ANSW✅✅Relief valve + 3.0 PSID
Check valve #2 on a RP should hold against backpressure and a minimum PSID of _____
ANSW✅✅1.0 PSID
RPDA and DCDA detect what? ANSW✅✅Low flows on lines that should not have flow indicating
illegal taps or leaks
Why do we flush test cocks in the order "4, 3, 2, 1" on a RP? ANSW✅✅To prevent it from
dumping
, The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping stops. What does that indicate? ANSW✅✅You have a leaking check valve #2
under a backpressure condition
The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping does not stop. You then open test cock #4 to induce flow across the device and the
dripping lets up or stops. What does that indicate? ANSW✅✅You have a leaking check valve #1
The RV on a RP drips steadily while the customer is not using water. You close the shutoff valve #2
and the dripping does not stop. You then open test cock #4 to induce flow across the device and the
dripping does not stop. What does that indicate? ANSW✅✅You most likely have an issue with the
relief valve. It could potentially be an issue with both check valve #1 and the relief valve
The RV on a RP drips steadily while the customer is using water. What does this indicate?
ANSW✅✅The RV leaks and/or the diaphragm is damaged
Check valve #1 on a DC assembly must hold a minimum PSID of _____ ANSW✅✅1.0 PSID
Check valve #2 on a DC assembly must hold a minimum PSID of _____ ANSW✅✅1.0 PSID
The maximum allowed pressure drop across a DC assembly according to AWWA is _____
ANSW✅✅10 PSI
When testing for the PSID across check valve #1 on a DC assembly, the sight tube on test cock #3
does not stop flowing. What does that indicate? ANSW✅✅Leaking shut off valve #1
When testing for the PSID across check valve #2 on a DC assembly, water recedes from the sight
tube on test cock #4. What does that indicate? ANSW✅✅Leaking shut off valve #2
The check valve on a PVB must close at _____ PSID ANSW✅✅1.0 PSID
The air inlet valve on a PVB must open at _____ PSID ANSW✅✅1.0 PSID
