BACKFLOW EXAM PREP STUDY GUIDE
QUESTIONS ANSWERS COMPLETE
SOLUTION BUNDLE
●● Air Gap
Answer: 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
receptacle.
●● Approved Air-Gap Separation
Answer: An approved air-gap separation is a distance through the free
atmosphere equal to two times the nominal diameter of the supply pipe
discharge opening, but never less than one inch.
●● Atmospheric Pressure
Answer: The pressure exerted by the weight of the atmosphere (14.7
psig) at sea level. As the elevation above sea level increases, the
atmospheric pressure decreases.
●● Atmospheric Vacuum Breaker
Answer: A mechanical device consisting of a float check valve and an
air-inlet port designed to prevent backsiphonage.
, ●● Auxiliary Water System
Answer: Any water system on or available to the premises other than the
public water system. These auxiliary water systems shall include used
water or water from a source other than the public water system, such as
wells, cisterns or open reservoirs that are equipped with pumps or other
prime movers, including gravity.
●● Backflow
Answer: The unintentional reversal of the normal direction of flow in a
potable water system that may result in the pollution or contamination of
the system by a liquid, gas, solids, or mixtures.
●● Backflow Prevention Device
Answer: Any device, method, or type of construction that is used to
prevent a backflow condition into a potable water system.
●● Backpressure Backflow
Answer: A reversal of the normal direction of flow in a water system due
to an increase in downstream pressure above that of the supply pressure.
The greater pressure can cause a non-potable substance to backflow into
the potable water system through unprotected cross-connections.
●● Non Potable
Answer: Any substance that is unsafe for human consumption or
culinary purposes.
QUESTIONS ANSWERS COMPLETE
SOLUTION BUNDLE
●● Air Gap
Answer: 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
receptacle.
●● Approved Air-Gap Separation
Answer: An approved air-gap separation is a distance through the free
atmosphere equal to two times the nominal diameter of the supply pipe
discharge opening, but never less than one inch.
●● Atmospheric Pressure
Answer: The pressure exerted by the weight of the atmosphere (14.7
psig) at sea level. As the elevation above sea level increases, the
atmospheric pressure decreases.
●● Atmospheric Vacuum Breaker
Answer: A mechanical device consisting of a float check valve and an
air-inlet port designed to prevent backsiphonage.
, ●● Auxiliary Water System
Answer: Any water system on or available to the premises other than the
public water system. These auxiliary water systems shall include used
water or water from a source other than the public water system, such as
wells, cisterns or open reservoirs that are equipped with pumps or other
prime movers, including gravity.
●● Backflow
Answer: The unintentional reversal of the normal direction of flow in a
potable water system that may result in the pollution or contamination of
the system by a liquid, gas, solids, or mixtures.
●● Backflow Prevention Device
Answer: Any device, method, or type of construction that is used to
prevent a backflow condition into a potable water system.
●● Backpressure Backflow
Answer: A reversal of the normal direction of flow in a water system due
to an increase in downstream pressure above that of the supply pressure.
The greater pressure can cause a non-potable substance to backflow into
the potable water system through unprotected cross-connections.
●● Non Potable
Answer: Any substance that is unsafe for human consumption or
culinary purposes.
