Backflow Assembly Tester Cert.
Workshop Exam 2026 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:
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. - Correct answer-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
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,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. - Correct answer-d. potable water supply pipeline and the overflow rim of
an open or
non-pressurized receiving
vessel.
3. An indirect cross-connection is one that is subject to what type of backflow?
a. only backsiphonage
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,b. only backpressure
c. only low hazard, backsiphonage or backpressure
d. high or low hazard, backsiphonage or backpressure - Correct answer-a. only
backsiphonage
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. - Correct
answer-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:
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, 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
d. stops from the sight tube at TC #4 and no differential shows on the gauge. -
Correct answer-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. - Correct
answer-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:
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Workshop Exam 2026 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:
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. - Correct answer-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
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,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. - Correct answer-d. potable water supply pipeline and the overflow rim of
an open or
non-pressurized receiving
vessel.
3. An indirect cross-connection is one that is subject to what type of backflow?
a. only backsiphonage
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,b. only backpressure
c. only low hazard, backsiphonage or backpressure
d. high or low hazard, backsiphonage or backpressure - Correct answer-a. only
backsiphonage
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. - Correct
answer-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:
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, 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
d. stops from the sight tube at TC #4 and no differential shows on the gauge. -
Correct answer-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. - Correct
answer-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:
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