BACKFLOW FINAL EXAM SCRIPT 2026
FULL QUESTIONS AND CORRECT ANSWERS
VERIFIED A+
●● Backflow Preventer.
Answer: A device installed in a plumbing system to prevent the reverse
flow of contaminated water into the clean water supply.
●● Cross-Connection.
Answer: A physical connection between a potable water supply and a
non-potable source, which can lead to backflow.
●● Atmospheric Vacuum Breaker.
Answer: A device that prevents backflow by allowing air to enter the
system when a negative pressure occurs.
●● Reduced Pressure Zone Device.
Answer: A backflow prevention assembly that maintains a lower
pressure in the protected system than in the supply line, preventing
contamination.
●● Backpressure.
, Answer: A condition in which the pressure in a system exceeds the
supply pressure, potentially causing backflow.
●● Back siphonage.
Answer: A specific type of backflow that occurs when there is a negative
pressure in the supply line, causing the flow of water to reverse.
●● Check Valve.
Answer: A valve that allows fluid to flow in one direction only,
preventing backflow.
●● Water Quality Standards.
Answer: Regulations that define the acceptable levels of contaminants in
drinking water to prevent health risks associated with backflow.
●● Testing and Maintenance.
Answer: Regular procedures performed on backflow prevention devices
to ensure they function correctly and prevent contamination.
●● Backflow.
Answer: The unintended reverse flow of liquid, often in plumbing
systems, which can lead to contamination of potable water.
●● Backflow Prevention Device.
FULL QUESTIONS AND CORRECT ANSWERS
VERIFIED A+
●● Backflow Preventer.
Answer: A device installed in a plumbing system to prevent the reverse
flow of contaminated water into the clean water supply.
●● Cross-Connection.
Answer: A physical connection between a potable water supply and a
non-potable source, which can lead to backflow.
●● Atmospheric Vacuum Breaker.
Answer: A device that prevents backflow by allowing air to enter the
system when a negative pressure occurs.
●● Reduced Pressure Zone Device.
Answer: A backflow prevention assembly that maintains a lower
pressure in the protected system than in the supply line, preventing
contamination.
●● Backpressure.
, Answer: A condition in which the pressure in a system exceeds the
supply pressure, potentially causing backflow.
●● Back siphonage.
Answer: A specific type of backflow that occurs when there is a negative
pressure in the supply line, causing the flow of water to reverse.
●● Check Valve.
Answer: A valve that allows fluid to flow in one direction only,
preventing backflow.
●● Water Quality Standards.
Answer: Regulations that define the acceptable levels of contaminants in
drinking water to prevent health risks associated with backflow.
●● Testing and Maintenance.
Answer: Regular procedures performed on backflow prevention devices
to ensure they function correctly and prevent contamination.
●● Backflow.
Answer: The unintended reverse flow of liquid, often in plumbing
systems, which can lead to contamination of potable water.
●● Backflow Prevention Device.
