Exam ASSE 5130 Practice Test Questions

Backflow Repair Technician Certification Exam (ASSE 5130) Practice Test Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which component in a reduced pressure principle assembly discharges

water during normal operation?

• Shutoff valve #2
• Relief valve
• First check valve
• 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:

• Filter debris
• Allow bidirectional flow 1 / 3

• Regulate flow rate
• 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:

• Pollution only
• Residential cross-connections
• Both pollution and contamination under backpressure or backsiphonage
• Fire sprinkler water only

Rationale: RPZ assemblies offer the highest level of mechanical backflow

protection.

• The correct order of components in a double check valve assembly from

inlet to outlet is:

• Shutoff, relief valve, check valve, test cocks
• Test cocks, check valve, shutoff
• Shutoff #1, check #1, test cocks, check #2, shutoff #2
• 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:

• Any direction
• Atmosphere
• A closed drain 2 / 3

• 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:

• 1.0 psid
• 1.0 psid minimum across each check
• 5.0 psid
• 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:

• No change in zone pressure
• Decreased outlet pressure
• Relief valve discharge
• Increased inlet pressure

Rationale: If check #1 leaks, the zone pressure rises, causing relief

discharge.

• Which tool is required to measure check valve performance?
• Flowmeter
• Thermometer
• Differential pressure gauge
• Volt meter

Rationale: Differential gauges read psid across checks and relief valves.

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