F.W. & P.C.O.A. Florida Backflow
Prevention Assembly Tester
Certification Course Q’s and A’s
Air Gap - <CORRECT 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.
Who Can Approve Backflow Prevention Assemblies - <CORRECT ANSWER >>The Foundation for
Cross-Connection Control and Hydraulic Research at The University of Southern California
Define Atmospheric Pressure - <CORRECT ANSWER >>The Pressure exerted by the weight of the
atmosphere.
As the elevation above see level increases the atmospheric pressure.... - <CORRECT ANSWER
>>Decreases
What is the weight of the atmosphere at sea level - <CORRECT ANSWER >>14.7 PSI
Atmospheric Vacuum Breaker (AVB) Prevents - <CORRECT ANSWER >>Backsiphonage
Define Backflow - <CORRECT ANSWER >>A reverse flow condition, created by a difference in
water pressure, which causes water to flow back into the distribution pipes of a potable water
supply from any source or sources other than an intended source.
Backflow can occur under what two conditions - <CORRECT ANSWER >>Backsiphonage and
backpressure conditions
,Backflow Prevention Assembly - <CORRECT ANSWER >>Any mechanical assembly, method, or
means that would prohibit the backflow of water or any other substance into the potable water
supply.
Define Backpressure - <CORRECT ANSWER >>A condition in which the pressure in the
downstream plumbing system is greater then the supply pressure in the potable distribution
system.
Backsiphonage - <CORRECT ANSWER >>The reversal of flow within a system that is caused by
negative pressure in the supply piping.
How high is a Barometric Loop? - <CORRECT ANSWER >>35FT in height
In a total vacuum will not rise higher then? - <CORRECT ANSWER >>33.9 Feet at sea level
Define Closed System - <CORRECT ANSWER >>Prevents any water that has passed through the
line from backflowing and re-entering the potable water system
Define Containment (Policy) - <CORRECT ANSWER >>To confine potential contamination caused
by a cross-connection within the facility where it arises by installing a backflow prevention
assembly at the meter or service connection when no meter is used.
Continuous Pressure - <CORRECT ANSWER >>Water used for 12 hours or more within a 24 hour
period.
Define Critical line level - <CORRECT ANSWER >>a reference line representing the level of the
check valve seat within a backsiphonage control unit. it is used to establish the Hight of the unit
above the highest outlet or flood level rim.
, Define Cross-Connection - <CORRECT ANSWER >>Any arrangement of pipes, fittings, fixture, or
devices that connects a non-potable system to a potable water system through which backflow
could occur (an unprotected connection)
Degree of hazard - <CORRECT ANSWER >>The danger posed by a particular substance or set of
circumstances.
Degree of hazard is separated into what two categories - <CORRECT ANSWER >>Low Degree of
Hazard and High Degree of Hazard
Define Low degree of Hazard - <CORRECT ANSWER >>One that does not affect health but may
be aesthetically objectionable.
Potable water that may be yellow in appearance.
Define High Degree of Hazard - <CORRECT ANSWER >>One that could cause serious illness or
death.
Define Direct Connection - <CORRECT ANSWER >>Any arrangement that connects a potable
water supply directly to a non-potable source.
at the meter without a backflow device a home is directly connected to the city.
Double Check Valve Assembly (DC, DCVA) - <CORRECT ANSWER >>A mechanical backflow
prevention device that has two independently acting spring loaded check valves. Two shut off
valves. Four test cocks.
A Double Check Valve Assembly can be used for what degree of Hazard - <CORRECT ANSWER
>>Non-Health / Low Hazard applications
Double Check Detector Backflow Prevention Assembly (DCDA) - <CORRECT ANSWER >>Is a
Double Check Valve Assembly with a bypass containing a water meter.
Prevention Assembly Tester
Certification Course Q’s and A’s
Air Gap - <CORRECT 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.
Who Can Approve Backflow Prevention Assemblies - <CORRECT ANSWER >>The Foundation for
Cross-Connection Control and Hydraulic Research at The University of Southern California
Define Atmospheric Pressure - <CORRECT ANSWER >>The Pressure exerted by the weight of the
atmosphere.
As the elevation above see level increases the atmospheric pressure.... - <CORRECT ANSWER
>>Decreases
What is the weight of the atmosphere at sea level - <CORRECT ANSWER >>14.7 PSI
Atmospheric Vacuum Breaker (AVB) Prevents - <CORRECT ANSWER >>Backsiphonage
Define Backflow - <CORRECT ANSWER >>A reverse flow condition, created by a difference in
water pressure, which causes water to flow back into the distribution pipes of a potable water
supply from any source or sources other than an intended source.
Backflow can occur under what two conditions - <CORRECT ANSWER >>Backsiphonage and
backpressure conditions
,Backflow Prevention Assembly - <CORRECT ANSWER >>Any mechanical assembly, method, or
means that would prohibit the backflow of water or any other substance into the potable water
supply.
Define Backpressure - <CORRECT ANSWER >>A condition in which the pressure in the
downstream plumbing system is greater then the supply pressure in the potable distribution
system.
Backsiphonage - <CORRECT ANSWER >>The reversal of flow within a system that is caused by
negative pressure in the supply piping.
How high is a Barometric Loop? - <CORRECT ANSWER >>35FT in height
In a total vacuum will not rise higher then? - <CORRECT ANSWER >>33.9 Feet at sea level
Define Closed System - <CORRECT ANSWER >>Prevents any water that has passed through the
line from backflowing and re-entering the potable water system
Define Containment (Policy) - <CORRECT ANSWER >>To confine potential contamination caused
by a cross-connection within the facility where it arises by installing a backflow prevention
assembly at the meter or service connection when no meter is used.
Continuous Pressure - <CORRECT ANSWER >>Water used for 12 hours or more within a 24 hour
period.
Define Critical line level - <CORRECT ANSWER >>a reference line representing the level of the
check valve seat within a backsiphonage control unit. it is used to establish the Hight of the unit
above the highest outlet or flood level rim.
, Define Cross-Connection - <CORRECT ANSWER >>Any arrangement of pipes, fittings, fixture, or
devices that connects a non-potable system to a potable water system through which backflow
could occur (an unprotected connection)
Degree of hazard - <CORRECT ANSWER >>The danger posed by a particular substance or set of
circumstances.
Degree of hazard is separated into what two categories - <CORRECT ANSWER >>Low Degree of
Hazard and High Degree of Hazard
Define Low degree of Hazard - <CORRECT ANSWER >>One that does not affect health but may
be aesthetically objectionable.
Potable water that may be yellow in appearance.
Define High Degree of Hazard - <CORRECT ANSWER >>One that could cause serious illness or
death.
Define Direct Connection - <CORRECT ANSWER >>Any arrangement that connects a potable
water supply directly to a non-potable source.
at the meter without a backflow device a home is directly connected to the city.
Double Check Valve Assembly (DC, DCVA) - <CORRECT ANSWER >>A mechanical backflow
prevention device that has two independently acting spring loaded check valves. Two shut off
valves. Four test cocks.
A Double Check Valve Assembly can be used for what degree of Hazard - <CORRECT ANSWER
>>Non-Health / Low Hazard applications
Double Check Detector Backflow Prevention Assembly (DCDA) - <CORRECT ANSWER >>Is a
Double Check Valve Assembly with a bypass containing a water meter.
