Cross connection control exam
2026/2027 with correct answers
Water pureyor - ANSWER-Who is responsible for the installation and use of lines on a premise
and for the avoidance of cross connections?
Backpressure - ANSWER-What condition may cause a reversal of flow in water lines?
In an accessible location above ground - ANSWER-Where is the best place to install a pressure
reducer backflow prevention device?
-It is easily altered
-water pressure is lost. - ANSWER-What are the limitations of air-gap separation?
-Double check valve assembly
-pressure vacuum breaker
-reduced pressure printable device - ANSWER-In the testing of which of the following is a
differential pressure gauge used?
No valves allowed downstream - ANSWER-Which of the following is a/are installation
requirement(s) for an atmospheric vacuum breaker?
Double check valve assembly - ANSWER-What do you call a device that consist of two internally
loaded check valves?
, 12 months - ANSWER-Under the specifications of the foundation of cross connection control
and hydraulic research, what is the minimum period of trouble-free field service required for a
device to gain approval?
1 inch - ANSWER-An air-gap my never be less than how many inch(es)?
Twelve inches above the highest outlet - ANSWER-What is the required minimum height of a
water supply line above the overflow rim of a receptacle or waste line for a proper air gap?
At least three PSI - ANSWER-What should be the difference between the opening point of the
relief valve and the differential across the first check valve in order to minimize excessive
discharges due to pressure fluctuations in the supply line?
At least 12 inches above the floor - ANSWER-Where must the relief valve discharge port of a
reduce pressure principal backflow preventer be installed?
Pressure vacuum breaker - ANSWER-Which device has a spring loaded air opening downstream
from a single check valve?
Two lines the diameter of the supply line - ANSWER-What is the minimum airgap separation?
-Test #1 check valve for leakage
-Test #2 check valve for leakage
-Test the relief valve to see if it will open at a differential of two PSI - ANSWER-What conditions
are checked when testing a reduced pressure backflow preventer.
Approved air gap separator - ANSWER-What protection is equal to or better than a reduced
pressure backflow prevention device?
2026/2027 with correct answers
Water pureyor - ANSWER-Who is responsible for the installation and use of lines on a premise
and for the avoidance of cross connections?
Backpressure - ANSWER-What condition may cause a reversal of flow in water lines?
In an accessible location above ground - ANSWER-Where is the best place to install a pressure
reducer backflow prevention device?
-It is easily altered
-water pressure is lost. - ANSWER-What are the limitations of air-gap separation?
-Double check valve assembly
-pressure vacuum breaker
-reduced pressure printable device - ANSWER-In the testing of which of the following is a
differential pressure gauge used?
No valves allowed downstream - ANSWER-Which of the following is a/are installation
requirement(s) for an atmospheric vacuum breaker?
Double check valve assembly - ANSWER-What do you call a device that consist of two internally
loaded check valves?
, 12 months - ANSWER-Under the specifications of the foundation of cross connection control
and hydraulic research, what is the minimum period of trouble-free field service required for a
device to gain approval?
1 inch - ANSWER-An air-gap my never be less than how many inch(es)?
Twelve inches above the highest outlet - ANSWER-What is the required minimum height of a
water supply line above the overflow rim of a receptacle or waste line for a proper air gap?
At least three PSI - ANSWER-What should be the difference between the opening point of the
relief valve and the differential across the first check valve in order to minimize excessive
discharges due to pressure fluctuations in the supply line?
At least 12 inches above the floor - ANSWER-Where must the relief valve discharge port of a
reduce pressure principal backflow preventer be installed?
Pressure vacuum breaker - ANSWER-Which device has a spring loaded air opening downstream
from a single check valve?
Two lines the diameter of the supply line - ANSWER-What is the minimum airgap separation?
-Test #1 check valve for leakage
-Test #2 check valve for leakage
-Test the relief valve to see if it will open at a differential of two PSI - ANSWER-What conditions
are checked when testing a reduced pressure backflow preventer.
Approved air gap separator - ANSWER-What protection is equal to or better than a reduced
pressure backflow prevention device?
