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Texas Irrigator License Exam 2024/25: Backflow Questions and Answers

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Texas Irrigator License Exam 2024/25: Backflow Questions and Answers

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Texas Irrigator License Exam 2024/25: Backflow
Questions and Answers


Backpressure Correct Ans-Where pressure in the discharge (outlet or downstream) side is
greater than pressure in the supply (inlet or upstream) side.


i.e. Gravity from elevation, pump, steam/air pressure.



Backsiphonage Correct Ans-Backflow from negative pressure in the system.


i.e Break in city main line or fire department using excessive amount of water.



Types of Backflow Preventors Correct Ans-Air Gap


Atmospheric Vacuum Breaker (AVB)


Pressure Vacuum Breaker (PVB)


Double Check Valve Assembly (DCVA or DC)


Reduced Pressure Principle Device (RP or RPZ)



+Double Check Valve Assembly (DCVA) Correct Ans-Backflow device that uses 2 shut-off
valves and 2 check valves to prevent backflow.



Degree of Hazard Correct Ans-Measure of risk to public health. Substances that affect this
include pollutants & contaminants.

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