Backflow Practice Exam
1) Backflow is the undesirable reversal of flow of water or other substances through a
cross connection into the public water system or consumer's: - ANS-C. Public water
system or consumer's portable water system
2) An approved airgap (AG) is a physical separation between the free-flowing end of a: -
ANS-D. Potable water supply pipe line in the overflow rim of an open or non-pressurized
receiving vessel
3) And indirect cross-connection is one that is subject to what type of backflow? -
ANS-A. Only backsiphonage
4 )Cross-connections with between the portable water piping in any piping or containers
containing substances not approved as potable water must be either eliminated or
controlled by the installation of an: - ANS-D. Approved air gap or an approved backflow
prevention assembly
5) While testing CV #2 of a DCVA if CV #2 leaks the BAT would observe that the water
flow: - ANS-D. Stops from the site tube at TC#4 and no differential shows on the gauge
6) Service protection is a way to protect a public water system from contamination due
to back flow from the customer's water system by the installing an approved backflow
preventer at the: - ANS-A. Service connection which is considered to be at or near the
water meter
7) A Washington state certified Backflow Assembly Tester is certified to: - ANS-D.
Inspect, test and monitor backflow prevention assemblies
8) The RPBA is designed so that if the check valve leaks, the relief with valve may: -
ANS-B. Open to discharge through the relief valve vent
9) An AG installed in lieu of an approved backflow prevention assembly must be
inspected for compliance with the definition of an improved air gap by: - ANS-C. Either a
CCS or a BAT
10) After testing an approved backflow prevention assembly the BAT shall complete a
test report that is acceptable to the: - ANS-C. Purveyor
, 11) The gauge on a differential pressure test kit indicates: - ANS-C. psid
12) Loading a check valve with springs or weights: - ANS-C. Reduces pressure down
stream of the check valve
13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge
unless: - ANS-C. The relief valve is defective
14) Microbiological contaminates entering the portible water system are always a: -
ANS-A. High-health standard
15) All approved backflow prevention assemblies must be tested with a: - ANS-D.
Differential pressure test kit
16) An approved backflow prevention assembly is an: - ANS-C. RPBA, RPDA, DCVA,
DCDA, PVBA, or SVBA of make, model, and size that is approved by the DOH
17) Permanent support blocks are required under all approved backflow assemblies that
are: - ANS-D. A large size assembly
18) A backflow assembly test report must be: - ANS-C. Complete, accurate and legible
19) SOV #1 of a properly installed PVBA
is reported as leaking while testing the air inlet valve if water continues to flow from: -
ANS-C. The high-bleed valve and the differential gauge does not drop to the opening
point of the Air Inlet Valve
20) The differential pressure relief valve must discharge water to the atmosphere when
the pressure in the zone between the check valves is with in: - ANS-B. 2 psi of the
pressure upstream of CV #1
21) The Undesirable reversal of flow of water or other substances through a cross
connection into the public water system or consumers potible water system is: - ANS-D.
Backflow
22) While testing CV#2 of an RPBA the BAT must determine if CV#2 closes tight: -
ANS-D. In the reverse direction of flow
23) A DCDA should not be installed: - ANS-B. Where pressure in the water system is
greater than the assembly's maximum working water pressure
1) Backflow is the undesirable reversal of flow of water or other substances through a
cross connection into the public water system or consumer's: - ANS-C. Public water
system or consumer's portable water system
2) An approved airgap (AG) is a physical separation between the free-flowing end of a: -
ANS-D. Potable water supply pipe line in the overflow rim of an open or non-pressurized
receiving vessel
3) And indirect cross-connection is one that is subject to what type of backflow? -
ANS-A. Only backsiphonage
4 )Cross-connections with between the portable water piping in any piping or containers
containing substances not approved as potable water must be either eliminated or
controlled by the installation of an: - ANS-D. Approved air gap or an approved backflow
prevention assembly
5) While testing CV #2 of a DCVA if CV #2 leaks the BAT would observe that the water
flow: - ANS-D. Stops from the site tube at TC#4 and no differential shows on the gauge
6) Service protection is a way to protect a public water system from contamination due
to back flow from the customer's water system by the installing an approved backflow
preventer at the: - ANS-A. Service connection which is considered to be at or near the
water meter
7) A Washington state certified Backflow Assembly Tester is certified to: - ANS-D.
Inspect, test and monitor backflow prevention assemblies
8) The RPBA is designed so that if the check valve leaks, the relief with valve may: -
ANS-B. Open to discharge through the relief valve vent
9) An AG installed in lieu of an approved backflow prevention assembly must be
inspected for compliance with the definition of an improved air gap by: - ANS-C. Either a
CCS or a BAT
10) After testing an approved backflow prevention assembly the BAT shall complete a
test report that is acceptable to the: - ANS-C. Purveyor
, 11) The gauge on a differential pressure test kit indicates: - ANS-C. psid
12) Loading a check valve with springs or weights: - ANS-C. Reduces pressure down
stream of the check valve
13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge
unless: - ANS-C. The relief valve is defective
14) Microbiological contaminates entering the portible water system are always a: -
ANS-A. High-health standard
15) All approved backflow prevention assemblies must be tested with a: - ANS-D.
Differential pressure test kit
16) An approved backflow prevention assembly is an: - ANS-C. RPBA, RPDA, DCVA,
DCDA, PVBA, or SVBA of make, model, and size that is approved by the DOH
17) Permanent support blocks are required under all approved backflow assemblies that
are: - ANS-D. A large size assembly
18) A backflow assembly test report must be: - ANS-C. Complete, accurate and legible
19) SOV #1 of a properly installed PVBA
is reported as leaking while testing the air inlet valve if water continues to flow from: -
ANS-C. The high-bleed valve and the differential gauge does not drop to the opening
point of the Air Inlet Valve
20) The differential pressure relief valve must discharge water to the atmosphere when
the pressure in the zone between the check valves is with in: - ANS-B. 2 psi of the
pressure upstream of CV #1
21) The Undesirable reversal of flow of water or other substances through a cross
connection into the public water system or consumers potible water system is: - ANS-D.
Backflow
22) While testing CV#2 of an RPBA the BAT must determine if CV#2 closes tight: -
ANS-D. In the reverse direction of flow
23) A DCDA should not be installed: - ANS-B. Where pressure in the water system is
greater than the assembly's maximum working water pressure
