Backflow Test Prep 1 Questions and
Correct Answers
Design, material, and operational standards for DCVA & RPBA are found in the - <CORRECT
ANSWER >>AWWA standards
Approved backflow prevention assemblies must be designed to be - <CORRECT ANSWER
>>disassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - <CORRECT ANSWER >>in the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - <CORRECT ANSWER >>10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - <CORRECT ANSWER >>20 psi
The markings required to be on all approved backflow prevention assemblies include -
<CORRECT ANSWER >>make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - <CORRECT ANSWER >>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 ANSWER
>>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 ANSWER
>>backflow
, Backsiphonage backflow is defined as backflow due to a reduction in system pressure. What
else must be present for - <CORRECT ANSWER >>an opening to atmosphere
Which of the following may cause backpressure backflow? - <CORRECT ANSWER >>any of the
above (elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - <CORRECT ANSWER >>both backsiphonage and
backpressure
An approved air gap is a physical separation between - <CORRECT ANSWER >>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 ANSWER
>>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 ANSWER >>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 ANSWER >>debris from within the supply piping
If a customer requires continuous water service it is recommended that - <CORRECT ANSWER
>>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 ANSWER >>resilient seated
Correct Answers
Design, material, and operational standards for DCVA & RPBA are found in the - <CORRECT
ANSWER >>AWWA standards
Approved backflow prevention assemblies must be designed to be - <CORRECT ANSWER
>>disassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - <CORRECT ANSWER >>in the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - <CORRECT ANSWER >>10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - <CORRECT ANSWER >>20 psi
The markings required to be on all approved backflow prevention assemblies include -
<CORRECT ANSWER >>make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - <CORRECT ANSWER >>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 ANSWER
>>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 ANSWER
>>backflow
, Backsiphonage backflow is defined as backflow due to a reduction in system pressure. What
else must be present for - <CORRECT ANSWER >>an opening to atmosphere
Which of the following may cause backpressure backflow? - <CORRECT ANSWER >>any of the
above (elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - <CORRECT ANSWER >>both backsiphonage and
backpressure
An approved air gap is a physical separation between - <CORRECT ANSWER >>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 ANSWER
>>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 ANSWER >>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 ANSWER >>debris from within the supply piping
If a customer requires continuous water service it is recommended that - <CORRECT ANSWER
>>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 ANSWER >>resilient seated
