BACKFLOW TEST PREP 1
QUESTIONS & ANSWERS|| 2026
LATEST UPDATE!!!
Design, material, and operational standards for DCVA & RPBA are found in the -
ANSWERAWWA standards
Approved backflow prevention assemblies must be designed to be -
ANSWERdisassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - ANSWERin the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - ANSWER10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - ANSWER20 psi
The markings required to be on all approved backflow prevention assemblies include -
ANSWERmake, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - ANSWERif 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 -
ANSWERcontaminate
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 -
ANSWERbackflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - ANSWERan opening to atmosphere
Which of the following may cause backpressure backflow? - ANSWERany of the above
(elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - ANSWERboth backsiphonage and
backpressure
, An approved air gap is a physical separation between - ANSWERthe 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 - ANSWERBackpressure
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 - ANSWERapproved 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 - ANSWERdebris from within the supply piping
If a customer requires continuous water service it is recommended that - ANSWERa
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
- ANSWERresilient seated
An approved backflow prevention assembly must be installed in such a manner that -
ANSWERit will not become flooded and with adequate space around the assembly to
facilitate testing and maintenance
An RPBA must not be installed where - ANSWERall 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)
A "special application device" is a term used to describe mechanical backflow
preventers that - ANSWERdo not meet the design requirements of an approved
backflow prevention assembly
In a backsiphonage event, if an approved SVBA is installed properly - ANSWERthe
check valve will close tight to make a water tight seal and the air inlet valve will fully
open
A differential pressure test kit is used to measure - ANSWERthe difference between
high and low pressure in an approved backflow prevention assembly
A compensating valve may be used to - ANSWERcompensate for a leaking SOV #1
while testing an approved DCVA
A sight tube is used while testing an approved - ANSWERDCVA
QUESTIONS & ANSWERS|| 2026
LATEST UPDATE!!!
Design, material, and operational standards for DCVA & RPBA are found in the -
ANSWERAWWA standards
Approved backflow prevention assemblies must be designed to be -
ANSWERdisassembled and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - ANSWERin the
direction of flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - ANSWER10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - ANSWER20 psi
The markings required to be on all approved backflow prevention assemblies include -
ANSWERmake, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - ANSWERif 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 -
ANSWERcontaminate
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 -
ANSWERbackflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - ANSWERan opening to atmosphere
Which of the following may cause backpressure backflow? - ANSWERany of the above
(elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - ANSWERboth backsiphonage and
backpressure
, An approved air gap is a physical separation between - ANSWERthe 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 - ANSWERBackpressure
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 - ANSWERapproved 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 - ANSWERdebris from within the supply piping
If a customer requires continuous water service it is recommended that - ANSWERa
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
- ANSWERresilient seated
An approved backflow prevention assembly must be installed in such a manner that -
ANSWERit will not become flooded and with adequate space around the assembly to
facilitate testing and maintenance
An RPBA must not be installed where - ANSWERall 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)
A "special application device" is a term used to describe mechanical backflow
preventers that - ANSWERdo not meet the design requirements of an approved
backflow prevention assembly
In a backsiphonage event, if an approved SVBA is installed properly - ANSWERthe
check valve will close tight to make a water tight seal and the air inlet valve will fully
open
A differential pressure test kit is used to measure - ANSWERthe difference between
high and low pressure in an approved backflow prevention assembly
A compensating valve may be used to - ANSWERcompensate for a leaking SOV #1
while testing an approved DCVA
A sight tube is used while testing an approved - ANSWERDCVA
