Arizona Backflow Prevention Assembly
Tester Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A certified backflow prevention assembly tester is inspecting a
residential property and observes that the assembly is leaking at the
test cock. What is the most appropriate immediate action?
A. Ignore the leak if it is minor
B. Report the issue to the property owner and schedule a repair
C. Attempt to repair the assembly without documentation
D. Continue testing other assemblies and note the leak later
B. Report the issue to the property owner and schedule a repair
Rationale: Any observed leaks in a backflow prevention assembly
compromise its function and require immediate notification to the
property owner and scheduling of repair to prevent contamination of the
potable water system.
2. When performing a double-check valve assembly (DCVA) test, the
gauge on the first check valve shows a pressure drop of 5 psi. What
does this indicate?
A. The first check valve is operating properly
B. The second check valve has failed
, C. The first check valve is leaking
D. The relief valve is malfunctioning
C. The first check valve is leaking
Rationale: A pressure drop across the first check valve in a DCVA indicates
that water is flowing backward past the valve, which signifies a leak and
failure of that check valve.
3. Which of the following tools is essential for testing a reduced pressure
principle assembly (RP) for proper operation?
A. Pipe wrench and hammer
B. Differential pressure gauge and test kit
C. Screwdriver and pliers
D. Teflon tape and adjustable wrench
B. Differential pressure gauge and test kit
Rationale: A differential pressure gauge is critical for measuring the
pressure across the relief valve and check valves in an RP assembly to
verify proper operation and ensure the assembly prevents backflow.
4. A backflow prevention assembly tester is required to calibrate their
test gauges annually. What is the primary reason for this requirement?
A. To comply with OSHA safety standards
B. To ensure accuracy and reliability of test results
C. To maintain company inventory
D. To reduce water consumption
B. To ensure accuracy and reliability of test results
Rationale: Annual calibration of test gauges ensures that measurements of
pressure differentials are accurate, which is vital for correctly assessing the
condition and functionality of backflow prevention assemblies.
5. Which type of backflow assembly is typically required for a high-
hazard cross-connection such as a boiler system?
A. Atmospheric vacuum breaker (AVB)
B. Pressure vacuum breaker (PVB)
, C. Double-check valve assembly (DCVA)
D. Reduced pressure principle assembly (RP)
D. Reduced pressure principle assembly (RP)
Rationale: RP assemblies provide the highest level of protection and are
required in high-hazard situations because they have a relief valve that
vents to the atmosphere, preventing any potential backflow from
contaminating the potable water supply.
6. During a test of a pressure vacuum breaker (PVB), water continuously
flows from the relief valve. What does this indicate?
A. The inlet shutoff is closed
B. The assembly is functioning correctly
C. The check valve or relief valve is faulty
D. The gauge is malfunctioning
C. The check valve or relief valve is faulty
Rationale: Continuous flow from the relief valve in a PVB indicates that the
internal check valve or relief valve is not holding pressure correctly, which
compromises the assembly’s ability to prevent backflow.
7. Which of the following conditions would require a backflow
prevention assembly to be removed from service immediately?
A. Minor leakage at test cocks
B. Assembly passes all tests with slight gauge fluctuation
C. Complete failure of the check valves or relief valve
D. Presence of normal water hammer
C. Complete failure of the check valves or relief valve
Rationale: A backflow assembly that has failed check valves or a relief
valve cannot protect the potable water supply and must be taken out of
service immediately to prevent contamination.
8. How should a tester handle documentation after completing a
backflow assembly test?
A. Keep results verbally communicated to the property owner
, B. Submit a signed and dated report to the governing authority
C. Only record assemblies that fail
D. Record results in a personal notebook without signature
B. Submit a signed and dated report to the governing authority
Rationale: Proper documentation ensures compliance with local
regulations and provides an official record of assembly testing, results, and
any maintenance actions taken.
9. A reduced pressure principle assembly shows a differential pressure
below the manufacturer’s specification during testing. What is the
recommended course of action?
A. Adjust the inlet pressure and retest
B. Remove the assembly from service and repair or replace
C. Ignore the reading if the downstream pressure is adequate
D. Only notify the property owner
B. Remove the assembly from service and repair or replace
Rationale: Differential pressure below specification indicates the assembly
may not prevent backflow. To protect the potable water system, the
assembly must be repaired or replaced before returning to service.
10. Which of the following assemblies is designed to protect against
backsiphonage only and not backpressure?
A. Atmospheric vacuum breaker (AVB)
B. Double-check valve assembly (DCVA)
C. Reduced pressure principle assembly (RP)
D. Pressure vacuum breaker (PVB)
A. Atmospheric vacuum breaker (AVB)
Rationale: AVBs are intended to prevent backsiphonage but cannot handle
backpressure. They are suitable for low-risk applications where
backpressure is not a concern.
11. During a field inspection, a tester notices debris lodged in the
check valve of a double-check assembly. What is the most appropriate
Tester Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A certified backflow prevention assembly tester is inspecting a
residential property and observes that the assembly is leaking at the
test cock. What is the most appropriate immediate action?
A. Ignore the leak if it is minor
B. Report the issue to the property owner and schedule a repair
C. Attempt to repair the assembly without documentation
D. Continue testing other assemblies and note the leak later
B. Report the issue to the property owner and schedule a repair
Rationale: Any observed leaks in a backflow prevention assembly
compromise its function and require immediate notification to the
property owner and scheduling of repair to prevent contamination of the
potable water system.
2. When performing a double-check valve assembly (DCVA) test, the
gauge on the first check valve shows a pressure drop of 5 psi. What
does this indicate?
A. The first check valve is operating properly
B. The second check valve has failed
, C. The first check valve is leaking
D. The relief valve is malfunctioning
C. The first check valve is leaking
Rationale: A pressure drop across the first check valve in a DCVA indicates
that water is flowing backward past the valve, which signifies a leak and
failure of that check valve.
3. Which of the following tools is essential for testing a reduced pressure
principle assembly (RP) for proper operation?
A. Pipe wrench and hammer
B. Differential pressure gauge and test kit
C. Screwdriver and pliers
D. Teflon tape and adjustable wrench
B. Differential pressure gauge and test kit
Rationale: A differential pressure gauge is critical for measuring the
pressure across the relief valve and check valves in an RP assembly to
verify proper operation and ensure the assembly prevents backflow.
4. A backflow prevention assembly tester is required to calibrate their
test gauges annually. What is the primary reason for this requirement?
A. To comply with OSHA safety standards
B. To ensure accuracy and reliability of test results
C. To maintain company inventory
D. To reduce water consumption
B. To ensure accuracy and reliability of test results
Rationale: Annual calibration of test gauges ensures that measurements of
pressure differentials are accurate, which is vital for correctly assessing the
condition and functionality of backflow prevention assemblies.
5. Which type of backflow assembly is typically required for a high-
hazard cross-connection such as a boiler system?
A. Atmospheric vacuum breaker (AVB)
B. Pressure vacuum breaker (PVB)
, C. Double-check valve assembly (DCVA)
D. Reduced pressure principle assembly (RP)
D. Reduced pressure principle assembly (RP)
Rationale: RP assemblies provide the highest level of protection and are
required in high-hazard situations because they have a relief valve that
vents to the atmosphere, preventing any potential backflow from
contaminating the potable water supply.
6. During a test of a pressure vacuum breaker (PVB), water continuously
flows from the relief valve. What does this indicate?
A. The inlet shutoff is closed
B. The assembly is functioning correctly
C. The check valve or relief valve is faulty
D. The gauge is malfunctioning
C. The check valve or relief valve is faulty
Rationale: Continuous flow from the relief valve in a PVB indicates that the
internal check valve or relief valve is not holding pressure correctly, which
compromises the assembly’s ability to prevent backflow.
7. Which of the following conditions would require a backflow
prevention assembly to be removed from service immediately?
A. Minor leakage at test cocks
B. Assembly passes all tests with slight gauge fluctuation
C. Complete failure of the check valves or relief valve
D. Presence of normal water hammer
C. Complete failure of the check valves or relief valve
Rationale: A backflow assembly that has failed check valves or a relief
valve cannot protect the potable water supply and must be taken out of
service immediately to prevent contamination.
8. How should a tester handle documentation after completing a
backflow assembly test?
A. Keep results verbally communicated to the property owner
, B. Submit a signed and dated report to the governing authority
C. Only record assemblies that fail
D. Record results in a personal notebook without signature
B. Submit a signed and dated report to the governing authority
Rationale: Proper documentation ensures compliance with local
regulations and provides an official record of assembly testing, results, and
any maintenance actions taken.
9. A reduced pressure principle assembly shows a differential pressure
below the manufacturer’s specification during testing. What is the
recommended course of action?
A. Adjust the inlet pressure and retest
B. Remove the assembly from service and repair or replace
C. Ignore the reading if the downstream pressure is adequate
D. Only notify the property owner
B. Remove the assembly from service and repair or replace
Rationale: Differential pressure below specification indicates the assembly
may not prevent backflow. To protect the potable water system, the
assembly must be repaired or replaced before returning to service.
10. Which of the following assemblies is designed to protect against
backsiphonage only and not backpressure?
A. Atmospheric vacuum breaker (AVB)
B. Double-check valve assembly (DCVA)
C. Reduced pressure principle assembly (RP)
D. Pressure vacuum breaker (PVB)
A. Atmospheric vacuum breaker (AVB)
Rationale: AVBs are intended to prevent backsiphonage but cannot handle
backpressure. They are suitable for low-risk applications where
backpressure is not a concern.
11. During a field inspection, a tester notices debris lodged in the
check valve of a double-check assembly. What is the most appropriate
