ASSE 5130 BACKFLOW PREVENTION
ASSEMBLY REPAIRER CERTIFICATION
QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. The primary purpose of a backflow prevention assembly is to
A. Increase water pressure
B. Prevent contamination of potable water
C. Improve water taste
D. Reduce pipe corrosion
Backflow prevention assemblies protect drinking water by preventing
reverse flow of contaminants.
2. Backflow caused by a reduction in supply pressure is known as
A. Backpressure
B. Backsiphonage
C. Crossflow
D. Thermal expansion
Backsiphonage occurs when negative pressure draws contaminants into
the system.
3. Which condition causes backpressure?
A. Vacuum in supply line
B. Elevated fixture location
C. Downstream pressure exceeding supply pressure
D. Closed valves
, Backpressure happens when downstream pressure is higher than
upstream supply pressure.
4. A Reduced Pressure Principle Assembly (RP) is required when
A. No hazard exists
B. Only backsiphonage is possible
C. High health hazard exists
D. System is residential only
RP assemblies provide maximum protection for high-hazard conditions.
5. Which assembly protects against both backpressure and backsiphonage?
A. AVB
B. PVB
C. RP
D. Hose bib vacuum breaker
RP assemblies are designed to protect against both types of backflow.
6. The minimum clearance below an RP relief valve is typically
A. 6 inches
B. 12 inches
C. 12–24 inches depending on code
D. 36 inches
Clearance allows proper discharge without flooding or obstruction.
7. A double check valve assembly (DCVA) is used primarily for
A. High hazard conditions
B. Low hazard conditions
C. Industrial chemical systems
D. Sewage systems
DCVAs are acceptable only where no health hazard exists.
8. Which component opens to discharge water when an RP assembly fails?
A. Shutoff valve
B. Check valve
C. Relief valve
D. Test cock
The relief valve prevents contaminated water from entering the supply.
, 9. Before repairing any backflow assembly, the repairer must
A. Notify neighbors
B. Obtain authorization from the water authority
C. Remove the assembly
D. Increase system pressure
Authorization ensures compliance with local regulations.
10.A fouled check valve usually results in
A. Increased pressure
B. Failure to hold differential pressure
C. Closed relief valve
D. Higher flow rate
Debris prevents proper sealing of the check valve.
11.Which tool is most commonly used during backflow assembly repair?
A. Pipe wrench
B. Hammer
C. Differential pressure gauge
D. Voltage tester
Pressure gauges are essential for verifying assembly performance.
12.Test cocks are used to
A. Drain the system
B. Increase flow
C. Measure pressure across checks
D. Flush debris
They provide access points for pressure testing.
13.Replacement parts must be
A. Generic equivalents
B. Manufacturer-approved
C. Larger than original
D. Made of brass only
Approved parts maintain certification and performance.
14.A leaking relief valve may indicate
A. Proper operation
B. Debris or worn seals
ASSEMBLY REPAIRER CERTIFICATION
QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. The primary purpose of a backflow prevention assembly is to
A. Increase water pressure
B. Prevent contamination of potable water
C. Improve water taste
D. Reduce pipe corrosion
Backflow prevention assemblies protect drinking water by preventing
reverse flow of contaminants.
2. Backflow caused by a reduction in supply pressure is known as
A. Backpressure
B. Backsiphonage
C. Crossflow
D. Thermal expansion
Backsiphonage occurs when negative pressure draws contaminants into
the system.
3. Which condition causes backpressure?
A. Vacuum in supply line
B. Elevated fixture location
C. Downstream pressure exceeding supply pressure
D. Closed valves
, Backpressure happens when downstream pressure is higher than
upstream supply pressure.
4. A Reduced Pressure Principle Assembly (RP) is required when
A. No hazard exists
B. Only backsiphonage is possible
C. High health hazard exists
D. System is residential only
RP assemblies provide maximum protection for high-hazard conditions.
5. Which assembly protects against both backpressure and backsiphonage?
A. AVB
B. PVB
C. RP
D. Hose bib vacuum breaker
RP assemblies are designed to protect against both types of backflow.
6. The minimum clearance below an RP relief valve is typically
A. 6 inches
B. 12 inches
C. 12–24 inches depending on code
D. 36 inches
Clearance allows proper discharge without flooding or obstruction.
7. A double check valve assembly (DCVA) is used primarily for
A. High hazard conditions
B. Low hazard conditions
C. Industrial chemical systems
D. Sewage systems
DCVAs are acceptable only where no health hazard exists.
8. Which component opens to discharge water when an RP assembly fails?
A. Shutoff valve
B. Check valve
C. Relief valve
D. Test cock
The relief valve prevents contaminated water from entering the supply.
, 9. Before repairing any backflow assembly, the repairer must
A. Notify neighbors
B. Obtain authorization from the water authority
C. Remove the assembly
D. Increase system pressure
Authorization ensures compliance with local regulations.
10.A fouled check valve usually results in
A. Increased pressure
B. Failure to hold differential pressure
C. Closed relief valve
D. Higher flow rate
Debris prevents proper sealing of the check valve.
11.Which tool is most commonly used during backflow assembly repair?
A. Pipe wrench
B. Hammer
C. Differential pressure gauge
D. Voltage tester
Pressure gauges are essential for verifying assembly performance.
12.Test cocks are used to
A. Drain the system
B. Increase flow
C. Measure pressure across checks
D. Flush debris
They provide access points for pressure testing.
13.Replacement parts must be
A. Generic equivalents
B. Manufacturer-approved
C. Larger than original
D. Made of brass only
Approved parts maintain certification and performance.
14.A leaking relief valve may indicate
A. Proper operation
B. Debris or worn seals
