BACKFLOW TEST PREP 1
QUESTIONS AND ANSWERS
Design, material, and operational standards for DCVA & RPBA are found in the -
Correct Answers -AWWA standards
Approved backflow prevention assemblies must be designed to be - Correct Answers -
disassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - Correct Answers -in the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - Correct Answers -10
psi
The maximum allowable pressure loss through a 3/4" RPBA is - Correct Answers -20
psi
The markings required to be on all approved backflow prevention assemblies include -
Correct Answers -make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - Correct Answers -if
the assembly is currently listed and approved for the orientation that it is installed
A cross-connection is defined as any actual or potential physical connection between a
public potable water system or the consumer's potable water system and any source of
non-potable liquid, solid, or gas that could the potable water supply by backflow -
Correct Answers -contaminate
The undesirable reversal of flow of water or other substances through a cross-
connection into the public water system or consumer's potable water system is - Correct
Answers -backflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - Correct Answers -an opening to atmosphere
Which of the following may cause backpressure backflow? - Correct Answers -any of
the above (elevated piping, pumps, hot water tanks)
, A direct cross-connection is subject to - Correct Answers -both backsiphonage and
backpressure
A column of water exerts pressure at the bottom of the column due to the - Correct
Answers -weight of the water in the column
If the gauge pressure in a water pipe is negative, this means that exists - Correct
Answers -a vacuum
The BAT must complete a test report form acceptable to the local water purveyor -
Correct Answers -after every test of an approved backflow prevention assembly or
inspection of an approved air gap
The results of a test of an approved backflow prevention assembly must be reported to
the water purveyor on a form acceptable to - Correct Answers -the purveyor
An approved air gap is a physical separation between - Correct Answers -the end of the
potable water supply pipe and the overflow rim of the receiving vessel, a distance of at
least 2 times supply pipe diameter and never less than 1"
An approved air gap is acceptable as backflow protection for - Correct Answers -
Backpressure as well as Backsiphonage and both High and Low Health Hazard
An approved backflow prevention assembly is an RPBA, RPDA, DCVA, DCDA, PVBA,
or SVBA of make, model and size that is - Correct Answers -approved by the
Washington State DOH, ODW
Newly installed backflow assemblies have a initial test primarily due to: high rate of
failure at the time of the - Correct Answers -debris from within the supply piping
If a customer requires continuous water service it is recommended that - Correct
Answers -a parallel set of backflow assemblies appropriate for the degree of hazard be
installed
The shut off valves used on approved Backflow Prevention assemblies must always be
- Correct Answers -resilient seated
An approved backflow prevention assembly must be installed in such a manner that -
Correct Answers -it will not become flooded and with adequate space around the
assembly to facilitate testing and maintenance
An RPBA must not be installed where - Correct Answers -all of the above (water spilt
from the assembly will be objectionable, the assembly will become flooded, the
assembly is more than 60 inches above the floor or ground)
QUESTIONS AND ANSWERS
Design, material, and operational standards for DCVA & RPBA are found in the -
Correct Answers -AWWA standards
Approved backflow prevention assemblies must be designed to be - Correct Answers -
disassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - Correct Answers -in the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - Correct Answers -10
psi
The maximum allowable pressure loss through a 3/4" RPBA is - Correct Answers -20
psi
The markings required to be on all approved backflow prevention assemblies include -
Correct Answers -make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - Correct Answers -if
the assembly is currently listed and approved for the orientation that it is installed
A cross-connection is defined as any actual or potential physical connection between a
public potable water system or the consumer's potable water system and any source of
non-potable liquid, solid, or gas that could the potable water supply by backflow -
Correct Answers -contaminate
The undesirable reversal of flow of water or other substances through a cross-
connection into the public water system or consumer's potable water system is - Correct
Answers -backflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - Correct Answers -an opening to atmosphere
Which of the following may cause backpressure backflow? - Correct Answers -any of
the above (elevated piping, pumps, hot water tanks)
, A direct cross-connection is subject to - Correct Answers -both backsiphonage and
backpressure
A column of water exerts pressure at the bottom of the column due to the - Correct
Answers -weight of the water in the column
If the gauge pressure in a water pipe is negative, this means that exists - Correct
Answers -a vacuum
The BAT must complete a test report form acceptable to the local water purveyor -
Correct Answers -after every test of an approved backflow prevention assembly or
inspection of an approved air gap
The results of a test of an approved backflow prevention assembly must be reported to
the water purveyor on a form acceptable to - Correct Answers -the purveyor
An approved air gap is a physical separation between - Correct Answers -the end of the
potable water supply pipe and the overflow rim of the receiving vessel, a distance of at
least 2 times supply pipe diameter and never less than 1"
An approved air gap is acceptable as backflow protection for - Correct Answers -
Backpressure as well as Backsiphonage and both High and Low Health Hazard
An approved backflow prevention assembly is an RPBA, RPDA, DCVA, DCDA, PVBA,
or SVBA of make, model and size that is - Correct Answers -approved by the
Washington State DOH, ODW
Newly installed backflow assemblies have a initial test primarily due to: high rate of
failure at the time of the - Correct Answers -debris from within the supply piping
If a customer requires continuous water service it is recommended that - Correct
Answers -a parallel set of backflow assemblies appropriate for the degree of hazard be
installed
The shut off valves used on approved Backflow Prevention assemblies must always be
- Correct Answers -resilient seated
An approved backflow prevention assembly must be installed in such a manner that -
Correct Answers -it will not become flooded and with adequate space around the
assembly to facilitate testing and maintenance
An RPBA must not be installed where - Correct Answers -all of the above (water spilt
from the assembly will be objectionable, the assembly will become flooded, the
assembly is more than 60 inches above the floor or ground)
