Cross Connection Certification
Exam Complete Questions and
Answers Latest 2025/2026
GRADED A+
1. Absolute pressure
- ANS - The total pressure. The gauge pressure plus the
atmospheric pressure at a given altitude.
2. Air gap
- ANS - The unobstructed vertical distance through the free
atmosphere between the lowest opening from any pipe or outlet
supplying water to a tank, plumbing fixture, or other device, and
the flood-level rim of the non-pressurized receiving vessel or
receptacle.
3. Approved
- ANS - Accepted by the Responsible Authority. Meets applicable
specifications and standards.
4. Atmospheric pressure
- ANS - The pressure exerted by the weight of the atmosphere. As
the elevation above sea level increases, the atmosphere pressure
decreases.
,5. Atmospheric vacuum breaker (AVB)
- ANS - A mechanical backflow prevention device consisting of a
float check valve and an air inlet port designed to prevent
backsiphonage by allowing air to enter the downstream water line.
The unit does not provide protection against backpressure or
continuous pressure. A shut-off valve is not allowed downstream
from the device.
6. Backflow
- ANS - The reversed flow of a non-potable source into a potable
system because a pressure differential exists where the pressure on
the non-potable side is greater than the pressure on the potable
side.
7. Backflow prevention assembly
- ANS - The entire backflow unit, icluding not only the mechanism
that actually prevents backflow, but also the shut-off valves and
test cocks. An assembly has a resilient seated, full-flow shut-off
valve before and after the backflow preventer.
8. Backflow prevention device
- ANS - Refers to the backflow prevention mechanism only. It does
not include the shut-off valves located on the inlet and outlet.
9. Backflow prevention method
- ANS - A mechanism for preventing backflow that includes
mechanical backflow prevention assemblies, devices, and air gaps.
,10. Backpressure
- ANS - Occurs when the non-potable system's pressure exceeds the
supply pressure
11. Backsiphonage
- ANS - Occurs when the supply line pressure falls below
atmospheric pressure causing a partial vacuum in the potable water
distribution system
12. Barometric loop
- ANS - a 34 foot vertical loop of piping that prevents
backsiphonage only based on pressure principles
13. Biological contaminants (high or health hazards)
- ANS - Agents that cause disease
14. Biological pollutants (low or non-health hazards)
- ANS - Agents that do no cause disease but that do decrease
aesthetic quality of the water
15. Breach of warranty
- ANS - A breaking of the promise that a certain fact is true
16. Bypass
- ANS - Any arrangement of pipes, plumbing, or hoses designed to
divert the flow around an installed device or assembly through
which the flow normally passes.
, 17. Chemical contaminants
- ANS - Substances that pose a threat to public health
18. Chemical pollutants
- ANS - Substances that do not pose a public health threat but
reduce the aesthetic quality of the water
19. Condition of service
- ANS - An agreement between water supplier and the consumer
that specifies the obligation and responsibilities of each in order
for service to be provided.
20. Containment (service protection)
- ANS - When backflow prevention assemblies are used to keep
contaminants from entering the distribution system from a water
consumer's facility
21. Contamination
- ANS - The introduction of any substance into water at levels that
degrade the quality of water, making it unfit for human
consumption because it would adversely affect public health.
22. Continuous pressure
- ANS - A condition in which upstream pressure is applied
continuously (more than 12 hours) to a device or assembly.
23. Critical level
- ANS - A reference line representing the level of the check valve
Exam Complete Questions and
Answers Latest 2025/2026
GRADED A+
1. Absolute pressure
- ANS - The total pressure. The gauge pressure plus the
atmospheric pressure at a given altitude.
2. Air gap
- ANS - The unobstructed vertical distance through the free
atmosphere between the lowest opening from any pipe or outlet
supplying water to a tank, plumbing fixture, or other device, and
the flood-level rim of the non-pressurized receiving vessel or
receptacle.
3. Approved
- ANS - Accepted by the Responsible Authority. Meets applicable
specifications and standards.
4. Atmospheric pressure
- ANS - The pressure exerted by the weight of the atmosphere. As
the elevation above sea level increases, the atmosphere pressure
decreases.
,5. Atmospheric vacuum breaker (AVB)
- ANS - A mechanical backflow prevention device consisting of a
float check valve and an air inlet port designed to prevent
backsiphonage by allowing air to enter the downstream water line.
The unit does not provide protection against backpressure or
continuous pressure. A shut-off valve is not allowed downstream
from the device.
6. Backflow
- ANS - The reversed flow of a non-potable source into a potable
system because a pressure differential exists where the pressure on
the non-potable side is greater than the pressure on the potable
side.
7. Backflow prevention assembly
- ANS - The entire backflow unit, icluding not only the mechanism
that actually prevents backflow, but also the shut-off valves and
test cocks. An assembly has a resilient seated, full-flow shut-off
valve before and after the backflow preventer.
8. Backflow prevention device
- ANS - Refers to the backflow prevention mechanism only. It does
not include the shut-off valves located on the inlet and outlet.
9. Backflow prevention method
- ANS - A mechanism for preventing backflow that includes
mechanical backflow prevention assemblies, devices, and air gaps.
,10. Backpressure
- ANS - Occurs when the non-potable system's pressure exceeds the
supply pressure
11. Backsiphonage
- ANS - Occurs when the supply line pressure falls below
atmospheric pressure causing a partial vacuum in the potable water
distribution system
12. Barometric loop
- ANS - a 34 foot vertical loop of piping that prevents
backsiphonage only based on pressure principles
13. Biological contaminants (high or health hazards)
- ANS - Agents that cause disease
14. Biological pollutants (low or non-health hazards)
- ANS - Agents that do no cause disease but that do decrease
aesthetic quality of the water
15. Breach of warranty
- ANS - A breaking of the promise that a certain fact is true
16. Bypass
- ANS - Any arrangement of pipes, plumbing, or hoses designed to
divert the flow around an installed device or assembly through
which the flow normally passes.
, 17. Chemical contaminants
- ANS - Substances that pose a threat to public health
18. Chemical pollutants
- ANS - Substances that do not pose a public health threat but
reduce the aesthetic quality of the water
19. Condition of service
- ANS - An agreement between water supplier and the consumer
that specifies the obligation and responsibilities of each in order
for service to be provided.
20. Containment (service protection)
- ANS - When backflow prevention assemblies are used to keep
contaminants from entering the distribution system from a water
consumer's facility
21. Contamination
- ANS - The introduction of any substance into water at levels that
degrade the quality of water, making it unfit for human
consumption because it would adversely affect public health.
22. Continuous pressure
- ANS - A condition in which upstream pressure is applied
continuously (more than 12 hours) to a device or assembly.
23. Critical level
- ANS - A reference line representing the level of the check valve
