Backflow Prevention Questions Lesson 1
With Correct Answers 2025/26.
Actual Cross Connection
Any arrangement of pipes, fittings, or devices that connects a potable water supply
DIRECTLY to a non-potable source at all times.
Air Gap
In plumbing, the unobstructed vertical distance though the free atmosphere
between the lowest opening from any pipe or outlet supplying water to a tank,
plumbing fixtures. or other container, and the over flow rom of that container.
Atmospheric Vacuum Breaker
A mechanical device consisting of a float check valve and an air-inlet port
designed to prevent backsphonage.
Auxiliary Supply
Any water source or system other than the potable water supply, that may be
available in the building or premises.
Backflow
A hydraulic condition, caused by a difference in pressures in which non-potable
water or other fluids flow into a potable water system.
Back Pressure
A backflow condition in which a pump, elevated tank, boiler, or other means
results in a downstream pressure greater than the supply pressure.
Backsiphonage
A backflow condition in which the pressure in the distribution system is less than
atmospheric pressure.
Bypass
With Correct Answers 2025/26.
Actual Cross Connection
Any arrangement of pipes, fittings, or devices that connects a potable water supply
DIRECTLY to a non-potable source at all times.
Air Gap
In plumbing, the unobstructed vertical distance though the free atmosphere
between the lowest opening from any pipe or outlet supplying water to a tank,
plumbing fixtures. or other container, and the over flow rom of that container.
Atmospheric Vacuum Breaker
A mechanical device consisting of a float check valve and an air-inlet port
designed to prevent backsphonage.
Auxiliary Supply
Any water source or system other than the potable water supply, that may be
available in the building or premises.
Backflow
A hydraulic condition, caused by a difference in pressures in which non-potable
water or other fluids flow into a potable water system.
Back Pressure
A backflow condition in which a pump, elevated tank, boiler, or other means
results in a downstream pressure greater than the supply pressure.
Backsiphonage
A backflow condition in which the pressure in the distribution system is less than
atmospheric pressure.
Bypass
