GA Backflow Prevention Assembly Tester
Training Exam Questions and Correct
Answers
Question 1
What is an Air Gap?
Correct Answer
The unobstructed vertical distance through the free atmosphere between the lowest
opening from any pipe or outlet supplying water to a tank, plumbing fixture, or
other container, and the overflow rim of that container
Question 2
Why do we flush test cocks in the order "4, 3, 2, 1" on a RP?
Correct Answer
To prevent it from dumping
Question 3
psig
Correct Answer
pounds per square inch, gage - the pressure above atmospheric pressure
Question 4
What is a pollutant?
Correct Answer
Non-health hazard - a substance that is aesthetically objectionable but will not
cause illness or death
Page 1 of 23
,Question 5
Required minimum system pressure in GA
Correct Answer
20 psi
Question 6
Organism that causes Hepatitis A
Correct Answer
Hepatitis A virus
Question 7
Can thermal expansion cause backpressure?
Correct Answer
Yes
Question 8
_______ and _______ decrease pressure across a check valve
Correct Answer
friction and restriction
Question 9
Check valve #1 on a DC assembly must hold a minimum PSID of _____
Correct Answer
1.0 PSID
Question 10
The check valve on a PVB must close at _____ PSID
Correct Answer
1.0 PSID
Page 2 of 23
, Question 11
What is an overflow level?
Correct Answer
The maximum height that water or liquid will rise in a receptacle before it flows over
the rim
Question 12
The air inlet valve on a PVB must open at _____ PSID
Correct Answer
1.0 PSID
Question 13
How many check valves are in a PVB?
Correct Answer
1
Question 14
When testing for the PSID across check valve #2 on a DC assembly, water continues
to flow from the sight tube on test cock #4. What does that indicate (assuming
nothing unusual was found while testing check valve #1)?
Correct Answer
Shut off #2 is leaking with backpressure from the system
Question 15
When testing the RV on a RP, the pressure differential drops to zero and the RV does
not open. What does this indicate?
Correct Answer
High pressure sensing tube is clogged and/or the RV is stuck closed
Page 3 of 23
Training Exam Questions and Correct
Answers
Question 1
What is an Air Gap?
Correct Answer
The unobstructed vertical distance through the free atmosphere between the lowest
opening from any pipe or outlet supplying water to a tank, plumbing fixture, or
other container, and the overflow rim of that container
Question 2
Why do we flush test cocks in the order "4, 3, 2, 1" on a RP?
Correct Answer
To prevent it from dumping
Question 3
psig
Correct Answer
pounds per square inch, gage - the pressure above atmospheric pressure
Question 4
What is a pollutant?
Correct Answer
Non-health hazard - a substance that is aesthetically objectionable but will not
cause illness or death
Page 1 of 23
,Question 5
Required minimum system pressure in GA
Correct Answer
20 psi
Question 6
Organism that causes Hepatitis A
Correct Answer
Hepatitis A virus
Question 7
Can thermal expansion cause backpressure?
Correct Answer
Yes
Question 8
_______ and _______ decrease pressure across a check valve
Correct Answer
friction and restriction
Question 9
Check valve #1 on a DC assembly must hold a minimum PSID of _____
Correct Answer
1.0 PSID
Question 10
The check valve on a PVB must close at _____ PSID
Correct Answer
1.0 PSID
Page 2 of 23
, Question 11
What is an overflow level?
Correct Answer
The maximum height that water or liquid will rise in a receptacle before it flows over
the rim
Question 12
The air inlet valve on a PVB must open at _____ PSID
Correct Answer
1.0 PSID
Question 13
How many check valves are in a PVB?
Correct Answer
1
Question 14
When testing for the PSID across check valve #2 on a DC assembly, water continues
to flow from the sight tube on test cock #4. What does that indicate (assuming
nothing unusual was found while testing check valve #1)?
Correct Answer
Shut off #2 is leaking with backpressure from the system
Question 15
When testing the RV on a RP, the pressure differential drops to zero and the RV does
not open. What does this indicate?
Correct Answer
High pressure sensing tube is clogged and/or the RV is stuck closed
Page 3 of 23
