Arizona Backflow Prevention Assembly Tester
Certification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a backflow prevention assembly?
A) To increase water pressure in the system
B) To prevent contaminated water from entering the potable
water supply
C) To reduce water flow to fixtures
D) To measure water usage
B – Backflow prevention assemblies are designed to prevent the
reversal of water flow, protecting the public water supply from
contamination.
2. Which type of backflow occurs when water flows from a lower
pressure to a higher pressure area?
A) Backpressure
B) Backsiphonage
, C) Cross-connection
D) Surge
A – Backpressure occurs when pressure in the downstream system
exceeds supply pressure, forcing water back into the potable system.
3. Backsiphonage is caused by:
A) High downstream pressure
B) Negative pressure in the supply line
C) Chemical reactions in water
D) Water hammer
B – Backsiphonage happens when negative pressure (vacuum or
partial vacuum) in the supply line draws potentially contaminated
water backward into the system.
4. Which of the following is a common type of backflow prevention
assembly?
A) Double Check Valve Assembly (DCVA)
B) Pressure Relief Valve
C) Gate Valve
D) Flow Restrictor
A – Double Check Valve Assemblies are widely used to prevent
backflow in non-health hazard situations.
, 5. A Reduced Pressure Zone Assembly (RPZA) is typically used where:
A) The hazard is minimal
B) There is a high health hazard
C) Water pressure needs to be increased
D) Only irrigation systems are involved
B – RPZAs are used in high-hazard situations because they provide the
highest level of protection against backflow.
6. Which component in a DCVA prevents backflow?
A) Strainer
B) Check valves
C) Relief valve
D) Pressure gauge
B – DCVAs rely on two check valves in series to stop the reverse flow of
water.
7. How often must most backflow prevention assemblies be tested in
Arizona?
A) Every month
B) Every six months
C) Every year
D) Every five years
, C – Arizona regulations require annual testing of assemblies to ensure
continued proper function.
8. Which tool is essential for testing backflow assemblies?
A) Pipe wrench
B) Backflow test kit
C) Screwdriver
D) Multimeter
B – A backflow test kit, including gauges and hoses, is necessary to
accurately measure valve operation and pressure differentials.
9. When testing an RPZA, the relief valve should open under which
condition?
A) During normal flow
B) When the pressure between the two checks drops below a set
value
C) When the inlet pressure exceeds 150 psi
D) Only during maintenance
B – The relief valve in an RPZA opens if the pressure between the two
check valves drops too low, indicating potential backflow.
10. A cross-connection is defined as:
A) Two pipes running parallel
B) A physical connection between potable and non-potable water
Certification Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a backflow prevention assembly?
A) To increase water pressure in the system
B) To prevent contaminated water from entering the potable
water supply
C) To reduce water flow to fixtures
D) To measure water usage
B – Backflow prevention assemblies are designed to prevent the
reversal of water flow, protecting the public water supply from
contamination.
2. Which type of backflow occurs when water flows from a lower
pressure to a higher pressure area?
A) Backpressure
B) Backsiphonage
, C) Cross-connection
D) Surge
A – Backpressure occurs when pressure in the downstream system
exceeds supply pressure, forcing water back into the potable system.
3. Backsiphonage is caused by:
A) High downstream pressure
B) Negative pressure in the supply line
C) Chemical reactions in water
D) Water hammer
B – Backsiphonage happens when negative pressure (vacuum or
partial vacuum) in the supply line draws potentially contaminated
water backward into the system.
4. Which of the following is a common type of backflow prevention
assembly?
A) Double Check Valve Assembly (DCVA)
B) Pressure Relief Valve
C) Gate Valve
D) Flow Restrictor
A – Double Check Valve Assemblies are widely used to prevent
backflow in non-health hazard situations.
, 5. A Reduced Pressure Zone Assembly (RPZA) is typically used where:
A) The hazard is minimal
B) There is a high health hazard
C) Water pressure needs to be increased
D) Only irrigation systems are involved
B – RPZAs are used in high-hazard situations because they provide the
highest level of protection against backflow.
6. Which component in a DCVA prevents backflow?
A) Strainer
B) Check valves
C) Relief valve
D) Pressure gauge
B – DCVAs rely on two check valves in series to stop the reverse flow of
water.
7. How often must most backflow prevention assemblies be tested in
Arizona?
A) Every month
B) Every six months
C) Every year
D) Every five years
, C – Arizona regulations require annual testing of assemblies to ensure
continued proper function.
8. Which tool is essential for testing backflow assemblies?
A) Pipe wrench
B) Backflow test kit
C) Screwdriver
D) Multimeter
B – A backflow test kit, including gauges and hoses, is necessary to
accurately measure valve operation and pressure differentials.
9. When testing an RPZA, the relief valve should open under which
condition?
A) During normal flow
B) When the pressure between the two checks drops below a set
value
C) When the inlet pressure exceeds 150 psi
D) Only during maintenance
B – The relief valve in an RPZA opens if the pressure between the two
check valves drops too low, indicating potential backflow.
10. A cross-connection is defined as:
A) Two pipes running parallel
B) A physical connection between potable and non-potable water
