Backflow Prevention latest 2025/2026 Practice exam with complete
100+ Questions and verified Solutions Graded at A+ Score| Sure
Guaranteed Pass!!
1.What are the first four steps before starting any backflow test? - answer Notify
Identify
Inspect
Observe
2.What does a leaking relief port on an RPBA indicate? (4) - answer Faulty check valve 1 or 2,
Low up stream pressure
Fluctuations in upstream pressure
3.What is the minimum height above the highest outlet or flood level rim for an AVB - answer 6"
4.Who is responsible for setting up a cross connection control program? - answer The water
purveyor
5.Can elevated piping be considered a potential back siphonage condition? - answer Yes
6.Can undersized piping be considered a potential back siphonage condition? - answer Yes
7.Can potable water booster pumps be considered a potential back siphonage condition? -
answer Yes
8.When testing a DCVA with sight tubes, about how long are the sight tubes? - answer 36"
,9.Which test involves using a bypass hose to connect test port 1 to test port 3? - answer
Confirmation test
10.What does the connection between test port 1 and 3 on a DCVA allow you to test? - answer
Check valve 1 in the reverse direction
11.A backflow assembly which consists of only 2 internally loaded check valves.... - answer DuC
dual check
12.Who can be liable for negligence, regulatory non-compliance or breach of contract? (5) -
answer The owner of the property
The plumbing contractor
The consulting engineer
The municipal inspector
The water purveyor
13.What is cross connection? - answer Any pipe, channel or link connecting a potable water
supply with a source of pollution, such that there may be a flow from the source of pollution to
the potable water.
14.What two ways can we affect water quality? - answer Pollution and contamination
15.Which is less severe, pollution or contamination? - answer Pollution is less but still non
potable
16.What does 1 cubic cm of water weigh? - answer .001 kg
,17.What does one psig = in kPa? - answer 6.9
18.What does 1 imp gallon weigh? - answer 10lbs
19.What does 1 US gallon weigh? - answer 8.33 lbs
20.How many gallons in a cubic foot? - answer 6.24imp gallons
21.How many inches of water column in 1 psi? - answer 27.7
22.Formula for TF? - answer Pressure x area
23.Calculate ft of head - answer Height x .433 psi/ft of head
24.Atmospheric pressure at sea level will support a column of water about how high? - answer
34ft
25.How often must an air gap be inspected if required? - answer Annually
26.A direction of flow in reverse to the normal direction is.... - answer Backflow
27.An ordinance would require a backflow preventer to be tested... - answer Annually
28.A connection where it is possible for non-potable fluid to enter a potable water system is
called? - answer Cross connection
, 29.When is a DIRECT connection between a potable water supply and a sewer connected waste
allowable? - answer Never
30.How many US GALLONS in a cubic foot? - answer 7.28
Containing a plumbing system from the public water supply requires backflow protection at the
_______?
A. Appliance or fixture
B. Building foundation
C. Irrigation system
D. Service Connection
E. Sprinkler riser - answer Service Connection
Backflow preventer manufacturers recommend that assemblies be field-tested annually and
when_____?
A. Installed
B. Moved
C. Repaired or Installed
D. Shut down
E. Water suppliers provide notice - answer Repaired or Installed
A differential pressure gauge reading of 0.2 psid is represented on water column sight tube by
_____?
A. 1/16 in. (0.16 cm)
B. 1/2 in. (1.3 cm)
C. 2 in. (5.1 cm)
D. 3.5 in. (8.9 cm)
E. 5.5 in. (14 cm) - answer 5.5 in. (14 cm)
100+ Questions and verified Solutions Graded at A+ Score| Sure
Guaranteed Pass!!
1.What are the first four steps before starting any backflow test? - answer Notify
Identify
Inspect
Observe
2.What does a leaking relief port on an RPBA indicate? (4) - answer Faulty check valve 1 or 2,
Low up stream pressure
Fluctuations in upstream pressure
3.What is the minimum height above the highest outlet or flood level rim for an AVB - answer 6"
4.Who is responsible for setting up a cross connection control program? - answer The water
purveyor
5.Can elevated piping be considered a potential back siphonage condition? - answer Yes
6.Can undersized piping be considered a potential back siphonage condition? - answer Yes
7.Can potable water booster pumps be considered a potential back siphonage condition? -
answer Yes
8.When testing a DCVA with sight tubes, about how long are the sight tubes? - answer 36"
,9.Which test involves using a bypass hose to connect test port 1 to test port 3? - answer
Confirmation test
10.What does the connection between test port 1 and 3 on a DCVA allow you to test? - answer
Check valve 1 in the reverse direction
11.A backflow assembly which consists of only 2 internally loaded check valves.... - answer DuC
dual check
12.Who can be liable for negligence, regulatory non-compliance or breach of contract? (5) -
answer The owner of the property
The plumbing contractor
The consulting engineer
The municipal inspector
The water purveyor
13.What is cross connection? - answer Any pipe, channel or link connecting a potable water
supply with a source of pollution, such that there may be a flow from the source of pollution to
the potable water.
14.What two ways can we affect water quality? - answer Pollution and contamination
15.Which is less severe, pollution or contamination? - answer Pollution is less but still non
potable
16.What does 1 cubic cm of water weigh? - answer .001 kg
,17.What does one psig = in kPa? - answer 6.9
18.What does 1 imp gallon weigh? - answer 10lbs
19.What does 1 US gallon weigh? - answer 8.33 lbs
20.How many gallons in a cubic foot? - answer 6.24imp gallons
21.How many inches of water column in 1 psi? - answer 27.7
22.Formula for TF? - answer Pressure x area
23.Calculate ft of head - answer Height x .433 psi/ft of head
24.Atmospheric pressure at sea level will support a column of water about how high? - answer
34ft
25.How often must an air gap be inspected if required? - answer Annually
26.A direction of flow in reverse to the normal direction is.... - answer Backflow
27.An ordinance would require a backflow preventer to be tested... - answer Annually
28.A connection where it is possible for non-potable fluid to enter a potable water system is
called? - answer Cross connection
, 29.When is a DIRECT connection between a potable water supply and a sewer connected waste
allowable? - answer Never
30.How many US GALLONS in a cubic foot? - answer 7.28
Containing a plumbing system from the public water supply requires backflow protection at the
_______?
A. Appliance or fixture
B. Building foundation
C. Irrigation system
D. Service Connection
E. Sprinkler riser - answer Service Connection
Backflow preventer manufacturers recommend that assemblies be field-tested annually and
when_____?
A. Installed
B. Moved
C. Repaired or Installed
D. Shut down
E. Water suppliers provide notice - answer Repaired or Installed
A differential pressure gauge reading of 0.2 psid is represented on water column sight tube by
_____?
A. 1/16 in. (0.16 cm)
B. 1/2 in. (1.3 cm)
C. 2 in. (5.1 cm)
D. 3.5 in. (8.9 cm)
E. 5.5 in. (14 cm) - answer 5.5 in. (14 cm)
