BACKFLOW PREVENTION ASSEMBLY
TESTER EXAM END OF COURSE STUDY
GUIDE LATEST UPDATED ACTUAL TESTED
QUESTIONS AND CORRECT ANSWERS
⩥ Who Can Approve Backflow Prevention Assemblies.
Answer: The Foundation for Cross-Connection Control and Hydraulic
Research at The University of Southern California
⩥ Define Atmospheric Pressure.
Answer: The Pressure exerted by the weight of the atmosphere.
⩥ As the elevation above see level increases the atmospheric pressure.....
Answer: Decreases
⩥ What is the weight of the atmosphere at sea level.
Answer: 14.7 PSI
⩥ Atmospheric Vacuum Breaker (AVB) Prevents.
Answer: Backsiphonage
⩥ Define Backflow.
,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.
Answer: Backsiphonage and backpressure conditions
⩥ Backflow Prevention Assembly.
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.
Answer: A condition in which the pressure in the downstream plumbing
system is greater then the supply pressure in the potable distribution
system.
⩥ Backsiphonage.
Answer: The reversal of flow within a system that is caused by negative
pressure in the supply piping.
⩥ How high is a Barometric Loop?.
Answer: 35FT in height
, ⩥ In a total vacuum will not rise higher then?.
Answer: 33.9 Feet at sea level
⩥ Define Closed System.
Answer: Prevents any water that has passed through the line from
backflowing and re-entering the potable water system
⩥ Define Containment (Policy).
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.
Answer: Water used for 12 hours or more within a 24 hour period.
⩥ Define Critical line level.
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.
TESTER EXAM END OF COURSE STUDY
GUIDE LATEST UPDATED ACTUAL TESTED
QUESTIONS AND CORRECT ANSWERS
⩥ Who Can Approve Backflow Prevention Assemblies.
Answer: The Foundation for Cross-Connection Control and Hydraulic
Research at The University of Southern California
⩥ Define Atmospheric Pressure.
Answer: The Pressure exerted by the weight of the atmosphere.
⩥ As the elevation above see level increases the atmospheric pressure.....
Answer: Decreases
⩥ What is the weight of the atmosphere at sea level.
Answer: 14.7 PSI
⩥ Atmospheric Vacuum Breaker (AVB) Prevents.
Answer: Backsiphonage
⩥ Define Backflow.
,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.
Answer: Backsiphonage and backpressure conditions
⩥ Backflow Prevention Assembly.
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.
Answer: A condition in which the pressure in the downstream plumbing
system is greater then the supply pressure in the potable distribution
system.
⩥ Backsiphonage.
Answer: The reversal of flow within a system that is caused by negative
pressure in the supply piping.
⩥ How high is a Barometric Loop?.
Answer: 35FT in height
, ⩥ In a total vacuum will not rise higher then?.
Answer: 33.9 Feet at sea level
⩥ Define Closed System.
Answer: Prevents any water that has passed through the line from
backflowing and re-entering the potable water system
⩥ Define Containment (Policy).
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.
Answer: Water used for 12 hours or more within a 24 hour period.
⩥ Define Critical line level.
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.
