Backflow Test Prep 1
Design, material, and operational standards for DCVA & RPBA are found in the -
ANS-AWWA standards
Approved backflow prevention assemblies must be designed to be - ANS-disassembled
and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - ANS-in the direction of
flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - ANS-10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - ANS-20 psi
The markings required to be on all approved backflow prevention assemblies include -
ANS-make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - ANS-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 -
ANS-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 -
ANS-backflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - ANS-an opening to atmosphere
Which of the following may cause backpressure backflow? - ANS-any of the above
(elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - ANS-both backsiphonage and backpressure
, An approved air gap is a physical separation between - ANS-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 - ANS-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 - ANS-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 - ANS-debris from within the supply piping
If a customer requires continuous water service it is recommended that - ANS-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
- ANS-resilient seated
An approved backflow prevention assembly must be installed in such a manner that -
ANS-it will not become flooded and with adequate space around the assembly to
facilitate testing and maintenance
An RPBA must not be installed where - ANS-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)
A "special application device" is a term used to describe mechanical backflow
preventers that - ANS-do not meet the design requirements of an approved backflow
prevention assembly
In a backsiphonage event, if an approved SVBA is installed properly - ANS-the 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 - ANS-the difference between high
and low pressure in an approved backflow prevention assembly
A compensating valve may be used to - ANS-compensate for a leaking SOV #1 while
testing an approved DCVA
Design, material, and operational standards for DCVA & RPBA are found in the -
ANS-AWWA standards
Approved backflow prevention assemblies must be designed to be - ANS-disassembled
and repaired in line for all sizes
Check valves must be internally loaded and must be drip-tight - ANS-in the direction of
flow with a minimum of 1 psi differential
The maximum allowable pressure loss through a 3/4" DCVA is - ANS-10 psi
The maximum allowable pressure loss through a 3/4" RPBA is - ANS-20 psi
The markings required to be on all approved backflow prevention assemblies include -
ANS-make, model, direction of flow, & MWP
As part of an inspection of the assembly a BAT must determine - ANS-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 -
ANS-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 -
ANS-backflow
Backsiphonage backflow is defined as backflow due to a reduction in system pressure.
What else must be present for - ANS-an opening to atmosphere
Which of the following may cause backpressure backflow? - ANS-any of the above
(elevated piping, pumps, hot water tanks)
A direct cross-connection is subject to - ANS-both backsiphonage and backpressure
, An approved air gap is a physical separation between - ANS-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 - ANS-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 - ANS-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 - ANS-debris from within the supply piping
If a customer requires continuous water service it is recommended that - ANS-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
- ANS-resilient seated
An approved backflow prevention assembly must be installed in such a manner that -
ANS-it will not become flooded and with adequate space around the assembly to
facilitate testing and maintenance
An RPBA must not be installed where - ANS-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)
A "special application device" is a term used to describe mechanical backflow
preventers that - ANS-do not meet the design requirements of an approved backflow
prevention assembly
In a backsiphonage event, if an approved SVBA is installed properly - ANS-the 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 - ANS-the difference between high
and low pressure in an approved backflow prevention assembly
A compensating valve may be used to - ANS-compensate for a leaking SOV #1 while
testing an approved DCVA
