Backflow Prevention Assemblies Questions With
Precise Solutions
Cross Connection Correct Answer - Is simply a point on a water
system where a polluting substance may come in contact with potable
water.
Backflow are required in Correct Answer - Every cross connection
has a potential to pollute the potable water supply
What are the two forms of backflow Correct Answer - - back
pressure
- back siphonage
Back Pressure (Irrigation side) Correct Answer - This type of
backflow occurs when the pressure from the irrigation system is
greater than the pressure from the water supply.
What causes back pressure Correct Answer - A pump installed
downstream the water supply, gravity, and water hammer
Back Siphonage (City SIde) Correct Answer - This type of
backflow occurs when the pressure from the supply side drops and
draws the water from the irrigation system into the water supply.
What causes back siphonage Correct Answer - A break in the city
water main, also when the fire department pumps large quantities of
water through the city's water main.
Air Gap Correct Answer - is a physical break that seperates the
polluted water from potable water.
Examples of Air gaps Correct Answer - A common example is the
sink. Dirty water in the sink can not go into the faucet
