Page 1 of 32
BACKFLOW ASSEMBLY TESTER CERT. WORKSHOP EXAM
LATEST UPDATE EXAM 2024\2025 QUESTIONS AND
CORRECT ANSWERS| GRADED A+
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:
a. non potable water system.
b. used water system or consumer's potable water system.
c. public water system or consumer's potable water system.
d. public water system or consumer's non potable system. - Ans: c. public water
system or consumer's potable water system.
2. An approved air gap (AG) is a physical separation between the free-flowing
end of a:
a. non potable water supply pipeline and the overflow rim of an open or
non-pressurized
receiving vessel.
b. potable water supply pipeline and the overflow drain of an open or
non-pressurized receiving
vessel.
c. potable water supply pipeline and the overflow rim of an open or
pressurized receiving
vessel.
d. potable water supply pipeline and the overflow rim of an open or
non-pressurized receiving
vessel. - Ans: d. potable water supply pipeline and the overflow rim of an open or
,Page 2 of 32
non-pressurized receiving
vessel.
3. An indirect cross-connection is one that is subject to what type of backflow?
a. only back siphonage
b. only backpressure
c. only low hazard, back siphonage or backpressure
d. high or low hazard, back siphonage or backpressure - Ans: a. only back
siphonage
4. Cross-connections between the potable water piping and any piping or
containers
containing substances not approved as potable water must be either
eliminated or
controlled by the installation of an:
a. air gap or a backflow prevention device.
b. approved air break or an backflow prevention device.
c. approved air gap or an approved backflow prevention device.
d. approved air gap or an approved backflow prevention assembly. - 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:
a. stops from the sight tube at TC #3 and no differential shows on the gauge.
b. stops from the sight tube at TC #4 and at least 1.0 psid shows on the gauge.
c. continues from the sight tube at TC #4 and at least 1.0 psid shows on gauge
,Page 3 of 32
d. stops from the sight tube at TC #4 and no differential shows on the gauge. - Ans:
d. stops from the sight 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 backflow from the customer's water system by the installing an approved
backflow preventer at the:
a. service connection which is considered to be at or near the water meter.
b. service connection which is considered to be the end of the customer's potable
water system furthest from the meter
c. point of use which is considered to be the start of the customer's potable
water system where the pipe goes through the outside wall of the building.
d. point of use which is normally considered to be inside the building. - 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:
a. inspect, test and repair backflow prevention assemblies.
b. inspect, test and monitor backflow prevention devices.
c. inspect, test and repair backflow prevention devices.
d. inspect, test and monitor backflow prevention assemblies. - Ans: d. inspect, test
and monitor backflow prevention assemblies.
8. The RPBA is designed so that if a check valve leaks, the relief valve may:
a. close to prevent water from entering the relief valve vent.
b. open to discharge through the relief valve vent.
c. open to discharge through the zone of reduced pressure.
d. close to prevent water from entering the zone of reduced pressure. - Ans: b.
open to discharge through the relief valve vent.
, Page 4 of 32
9. An AG installed in lieu of an approved backflow prevention assembly must
be inspected for
compliance with the definition of an approved air gap by:
a. only a BAT.
b. only a CCS.
c. either a CCS or a BAT.
d. both a CCS and a BAT. - 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:
a. DOH.
b. LAA.
c. purveyor.
d. customer. - Ans: c. purveyor.
11. The gauge on a differential pressure test kit indicates:
a. psia.
b psig.
c. psid.
d. psiy. - Ans: c. psid.
12. Loading a check valve with springs or weights:
a. increases pressure downstream of the check valve.
BACKFLOW ASSEMBLY TESTER CERT. WORKSHOP EXAM
LATEST UPDATE EXAM 2024\2025 QUESTIONS AND
CORRECT ANSWERS| GRADED A+
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:
a. non potable water system.
b. used water system or consumer's potable water system.
c. public water system or consumer's potable water system.
d. public water system or consumer's non potable system. - Ans: c. public water
system or consumer's potable water system.
2. An approved air gap (AG) is a physical separation between the free-flowing
end of a:
a. non potable water supply pipeline and the overflow rim of an open or
non-pressurized
receiving vessel.
b. potable water supply pipeline and the overflow drain of an open or
non-pressurized receiving
vessel.
c. potable water supply pipeline and the overflow rim of an open or
pressurized receiving
vessel.
d. potable water supply pipeline and the overflow rim of an open or
non-pressurized receiving
vessel. - Ans: d. potable water supply pipeline and the overflow rim of an open or
,Page 2 of 32
non-pressurized receiving
vessel.
3. An indirect cross-connection is one that is subject to what type of backflow?
a. only back siphonage
b. only backpressure
c. only low hazard, back siphonage or backpressure
d. high or low hazard, back siphonage or backpressure - Ans: a. only back
siphonage
4. Cross-connections between the potable water piping and any piping or
containers
containing substances not approved as potable water must be either
eliminated or
controlled by the installation of an:
a. air gap or a backflow prevention device.
b. approved air break or an backflow prevention device.
c. approved air gap or an approved backflow prevention device.
d. approved air gap or an approved backflow prevention assembly. - 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:
a. stops from the sight tube at TC #3 and no differential shows on the gauge.
b. stops from the sight tube at TC #4 and at least 1.0 psid shows on the gauge.
c. continues from the sight tube at TC #4 and at least 1.0 psid shows on gauge
,Page 3 of 32
d. stops from the sight tube at TC #4 and no differential shows on the gauge. - Ans:
d. stops from the sight 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 backflow from the customer's water system by the installing an approved
backflow preventer at the:
a. service connection which is considered to be at or near the water meter.
b. service connection which is considered to be the end of the customer's potable
water system furthest from the meter
c. point of use which is considered to be the start of the customer's potable
water system where the pipe goes through the outside wall of the building.
d. point of use which is normally considered to be inside the building. - 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:
a. inspect, test and repair backflow prevention assemblies.
b. inspect, test and monitor backflow prevention devices.
c. inspect, test and repair backflow prevention devices.
d. inspect, test and monitor backflow prevention assemblies. - Ans: d. inspect, test
and monitor backflow prevention assemblies.
8. The RPBA is designed so that if a check valve leaks, the relief valve may:
a. close to prevent water from entering the relief valve vent.
b. open to discharge through the relief valve vent.
c. open to discharge through the zone of reduced pressure.
d. close to prevent water from entering the zone of reduced pressure. - Ans: b.
open to discharge through the relief valve vent.
, Page 4 of 32
9. An AG installed in lieu of an approved backflow prevention assembly must
be inspected for
compliance with the definition of an approved air gap by:
a. only a BAT.
b. only a CCS.
c. either a CCS or a BAT.
d. both a CCS and a BAT. - 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:
a. DOH.
b. LAA.
c. purveyor.
d. customer. - Ans: c. purveyor.
11. The gauge on a differential pressure test kit indicates:
a. psia.
b psig.
c. psid.
d. psiy. - Ans: c. psid.
12. Loading a check valve with springs or weights:
a. increases pressure downstream of the check valve.
