BACKFLOW PRACTICE EXAM
QUESTIONS AND ANSWERS
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: - Correct Answers -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: -
Correct Answers -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? -
Correct Answers -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: - Correct Answers -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: - Correct Answers -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: - Correct Answers -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: - Correct
Answers -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: -
Correct Answers -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: - Correct
Answers -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: - Correct Answers -C. Purveyor
11) The gauge on a differential pressure test kit indicates: - Correct Answers -C. psid
12) Loading a check valve with springs or weights: - Correct Answers -C. Reduces
pressure down stream of the check valve
94) What would the gauge indicate as pressure is increased in the zone of reduced
pressure, when testing the relief valve on an RPBA? - Correct Answers -A
95) When testing CV #2 on a DCVA, water continues to flow from the sight tube
attached to TC#4 and the gauge shows no differential, the most likely cause is: -
Correct Answers -D
96) When testing the relief valve on an RPBA, the needle on the gauge does not drop to
the relief valve opening point and the relief valve does NOT vent, the most likely cause
is? - Correct Answers -B
13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge
unless: - Correct Answers -C. The relief valve is defective
14) Microbiological contaminates entering the portible water system are always a: -
Correct Answers -A. High-health standard
15) All approved backflow prevention assemblies must be tested with a: - Correct
Answers -D. Differential pressure test kit
16) An approved backflow prevention assembly is an: - Correct Answers -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: - Correct Answers -D. A large size assembly
18) A backflow assembly test report must be: - Correct Answers -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: -
Correct Answers -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: - Correct Answers -B. 2
psi of the pressure upstream of CV #1
QUESTIONS AND ANSWERS
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: - Correct Answers -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: -
Correct Answers -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? -
Correct Answers -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: - Correct Answers -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: - Correct Answers -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: - Correct Answers -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: - Correct
Answers -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: -
Correct Answers -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: - Correct
Answers -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: - Correct Answers -C. Purveyor
11) The gauge on a differential pressure test kit indicates: - Correct Answers -C. psid
12) Loading a check valve with springs or weights: - Correct Answers -C. Reduces
pressure down stream of the check valve
94) What would the gauge indicate as pressure is increased in the zone of reduced
pressure, when testing the relief valve on an RPBA? - Correct Answers -A
95) When testing CV #2 on a DCVA, water continues to flow from the sight tube
attached to TC#4 and the gauge shows no differential, the most likely cause is: -
Correct Answers -D
96) When testing the relief valve on an RPBA, the needle on the gauge does not drop to
the relief valve opening point and the relief valve does NOT vent, the most likely cause
is? - Correct Answers -B
13) If there is flow across CV#1 and through an RPBA the relief valve will not discharge
unless: - Correct Answers -C. The relief valve is defective
14) Microbiological contaminates entering the portible water system are always a: -
Correct Answers -A. High-health standard
15) All approved backflow prevention assemblies must be tested with a: - Correct
Answers -D. Differential pressure test kit
16) An approved backflow prevention assembly is an: - Correct Answers -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: - Correct Answers -D. A large size assembly
18) A backflow assembly test report must be: - Correct Answers -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: -
Correct Answers -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: - Correct Answers -B. 2
psi of the pressure upstream of CV #1
