Backflow
Repair Technician Certification Exam (ASSE
5130) Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
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1. Which component in a reduced pressure principle assembly discharges
water during normal operation?
A. Shutoff valve #2
B. Relief valve
C. First check valve
D. Test cock #1
,Rationale: The relief valve between the checks opens under normal
pressure fluctuations to maintain protection.
2. The major function of a check valve in a backflow assembly is to:
A. Filter debris
B. Allow bidirectional flow
,C. Regulate flow rate
D. Prevent reverse flow
Rationale: Check valves are one-direction components that stop reverse
flow caused by backpressure or backsiphonage.
3. A reduced pressure zone assembly provides protection against:
A. Pollution only
B. Residential cross-connections
C. Both pollution and contamination under backpressure or backsiphonage
D. Fire sprinkler water only
Rationale: RPZ assemblies offer the highest level of mechanical backflow
protection.
4. The correct order of components in a double check valve assembly from
inlet to outlet is:
A. Shutoff, relief valve, check valve, test cocks
B. Test cocks, check valve, shutoff
C. Shutoff #1, check #1, test cocks, check #2, shutoff #2
D. Relief valve, check valves, shutoff
Rationale: DCA assemblies always have check valves placed between two
shutoff valves.
5. The relief valve in an RP assembly must discharge to:
A. Any direction
B. Atmosphere
C. A closed drain
, D. The downstream line
Rationale: Atmospheric discharge ensures reduced pressure zone integrity
if checks fail.
6. When testing a DCA, the minimum required check valve closure is:
A. 1.0 psid
B. 1.0 psid minimum across each check
C. 5.0 psid
D. 14 psi
Rationale: Both checks must close with at least 1.0 psid to ensure proper
function.
7. A failing first check valve in an RP typically causes:
A. No change in zone pressure
B. Decreased outlet pressure
C. Relief valve discharge
D. Increased inlet pressure
Rationale: If check #1 leaks, the zone pressure rises, causing relief
discharge.
8. Which tool is required to measure check valve performance?
A. Flowmeter
B. Thermometer
C. Differential pressure gauge
D. Volt meter
Rationale: Differential gauges read psid across checks and relief valves.
Repair Technician Certification Exam (ASSE
5130) Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
1. Which component in a reduced pressure principle assembly discharges
water during normal operation?
A. Shutoff valve #2
B. Relief valve
C. First check valve
D. Test cock #1
,Rationale: The relief valve between the checks opens under normal
pressure fluctuations to maintain protection.
2. The major function of a check valve in a backflow assembly is to:
A. Filter debris
B. Allow bidirectional flow
,C. Regulate flow rate
D. Prevent reverse flow
Rationale: Check valves are one-direction components that stop reverse
flow caused by backpressure or backsiphonage.
3. A reduced pressure zone assembly provides protection against:
A. Pollution only
B. Residential cross-connections
C. Both pollution and contamination under backpressure or backsiphonage
D. Fire sprinkler water only
Rationale: RPZ assemblies offer the highest level of mechanical backflow
protection.
4. The correct order of components in a double check valve assembly from
inlet to outlet is:
A. Shutoff, relief valve, check valve, test cocks
B. Test cocks, check valve, shutoff
C. Shutoff #1, check #1, test cocks, check #2, shutoff #2
D. Relief valve, check valves, shutoff
Rationale: DCA assemblies always have check valves placed between two
shutoff valves.
5. The relief valve in an RP assembly must discharge to:
A. Any direction
B. Atmosphere
C. A closed drain
, D. The downstream line
Rationale: Atmospheric discharge ensures reduced pressure zone integrity
if checks fail.
6. When testing a DCA, the minimum required check valve closure is:
A. 1.0 psid
B. 1.0 psid minimum across each check
C. 5.0 psid
D. 14 psi
Rationale: Both checks must close with at least 1.0 psid to ensure proper
function.
7. A failing first check valve in an RP typically causes:
A. No change in zone pressure
B. Decreased outlet pressure
C. Relief valve discharge
D. Increased inlet pressure
Rationale: If check #1 leaks, the zone pressure rises, causing relief
discharge.
8. Which tool is required to measure check valve performance?
A. Flowmeter
B. Thermometer
C. Differential pressure gauge
D. Volt meter
Rationale: Differential gauges read psid across checks and relief valves.
