BACKFLOW CERTIFICATION TREEO
CENTER, UF QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
1. What is the correct height to install an air gap?
A. Equal to the diameter of the supply pipe
B. Two times the nominal diameter of the supply pipe or a minimum of 1 inch
C. One inch higher than the supply pipe
D. Three times the nominal diameter of the supply pipe
Answer: B. Two times the nominal diameter of the supply pipe or a minimum
of 1 inch
2. What are the components of a Reduced Pressure (RP) assembly?
A. One check valve, a pressure relief valve, and a shut-off valve
B. Two independently operating check valves, a relief valve assembly, four test
cocks, and two shut-off valves
C. A single check valve and a backflow preventer
D. Two pressure relief valves, a check valve, and one test cock
Answer: B. Two independently operating check valves, a relief valve
assembly, four test cocks, and two shut-off valves
3. What are the components of a Double Check Valve Assembly (DCVA)?
A. One check valve and one shut-off valve
B. Two independently operating check valves, four test cocks, and two shut-off
valves
C. A pressure relief valve and a check valve
D. Two test cocks and a pressure relief assembly
Answer: B. Two independently operating check valves, four test cocks, and
two shut-off valves
4. What is the definition of backsiphonage?
A. Backflow caused by high supply pressure
, B. Backflow caused by a drop in supply pressure below atmospheric pressure
C. Water flowing from a low-pressure zone to a high-pressure zone
D. Water flowing from a clean to a contaminated source
Answer: B. Backflow caused by a drop in supply pressure below atmospheric
pressure
5. Why does the relief valve (RV) drip after closing the customer's shut-off
valve?
A. The pressure is too high in the system
B. CV #1 leaks
C. The RV is malfunctioning
D. The system is over-pressurized
Answer: B. CV #1 leaks
6. What causes the relief valve (RV) to spit?
A. A drop in water temperature
B. Line pressure fluctuation
C. Excessive flow rate
D. A blockage in the system
Answer: B. Line pressure fluctuation
7. If there is backpressure on the RP assembly, what happens to the relief
valve (RV)?
A. The RV opens to dump the zone
B. The RV does nothing unless CV #2 leaks
C. The RV closes completely
D. The RV continuously releases water
Answer: B. The RV does nothing unless CV #2 leaks
8. If there is a drop in supply pressure, what does the relief valve (RV) do?
A. Closes to prevent backflow
B. Opens to dump the zone
C. Stops water flow
CENTER, UF QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
1. What is the correct height to install an air gap?
A. Equal to the diameter of the supply pipe
B. Two times the nominal diameter of the supply pipe or a minimum of 1 inch
C. One inch higher than the supply pipe
D. Three times the nominal diameter of the supply pipe
Answer: B. Two times the nominal diameter of the supply pipe or a minimum
of 1 inch
2. What are the components of a Reduced Pressure (RP) assembly?
A. One check valve, a pressure relief valve, and a shut-off valve
B. Two independently operating check valves, a relief valve assembly, four test
cocks, and two shut-off valves
C. A single check valve and a backflow preventer
D. Two pressure relief valves, a check valve, and one test cock
Answer: B. Two independently operating check valves, a relief valve
assembly, four test cocks, and two shut-off valves
3. What are the components of a Double Check Valve Assembly (DCVA)?
A. One check valve and one shut-off valve
B. Two independently operating check valves, four test cocks, and two shut-off
valves
C. A pressure relief valve and a check valve
D. Two test cocks and a pressure relief assembly
Answer: B. Two independently operating check valves, four test cocks, and
two shut-off valves
4. What is the definition of backsiphonage?
A. Backflow caused by high supply pressure
, B. Backflow caused by a drop in supply pressure below atmospheric pressure
C. Water flowing from a low-pressure zone to a high-pressure zone
D. Water flowing from a clean to a contaminated source
Answer: B. Backflow caused by a drop in supply pressure below atmospheric
pressure
5. Why does the relief valve (RV) drip after closing the customer's shut-off
valve?
A. The pressure is too high in the system
B. CV #1 leaks
C. The RV is malfunctioning
D. The system is over-pressurized
Answer: B. CV #1 leaks
6. What causes the relief valve (RV) to spit?
A. A drop in water temperature
B. Line pressure fluctuation
C. Excessive flow rate
D. A blockage in the system
Answer: B. Line pressure fluctuation
7. If there is backpressure on the RP assembly, what happens to the relief
valve (RV)?
A. The RV opens to dump the zone
B. The RV does nothing unless CV #2 leaks
C. The RV closes completely
D. The RV continuously releases water
Answer: B. The RV does nothing unless CV #2 leaks
8. If there is a drop in supply pressure, what does the relief valve (RV) do?
A. Closes to prevent backflow
B. Opens to dump the zone
C. Stops water flow
