Backflow Prevention Practice Exam
Questions with Correct Answers 100% Pass
1. 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 CORRECT ANSWER Service Connection
2. 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 CORRECT ANSWER Repaired or Installed
3. A differential pressure gauge reading of 0.2 psid is represented on water column sight tu
be 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) CORRECT ANSWER 5.5 in. (14 cm)
4. Pollution of a public water supply suggests the substance in the water is ?
A. Aesthetically bad
B. Biological with virus only
C. Lowering the pH below 1.4
D. Radiological
E. Toxic CORRECT ANSWER Aesthetically bad
,5. Backsiphonage may occur when the pressure inside copper tubing is ?
A. Greater than atmospheric pressure
B. Greater than barometric pressure
C. Greater than 0 gauge pressure
D. Less than absolute pressure
E. Less than atmospheric pressure CORRECT
ANSWER Less than atmospheric pressure
6. A cross-connection may be a permanent piping arrangement or a(n) ?
A. Backflow preventer
B. Church symbol
C. OSHA hazardous area designation
D. Railroad and highway intersection sign
E. Temporary hose bibb connection CORRECT
ANSWER Temporary hose bibb connection
7. The isolation of a plumbing water system hazard requires ?
A. Appliance protection
B. Building quarantine
C. High-hazard protection
D. Meter protection
E. Toxin monitoring CORRECT ANSWER Appliance protection
8. A direct cross-connection suggests the piping system may be subjected to ?
A. Backpressure or backsiphonage
B. Backsiphonage only
C. Periodic inspection
D. Sustained pressure
E. Toxic materials CORRECT ANSWER Backpressure or backsiphonage
9. A pipe restriction's flow velocity increase may allow ?
A. Aspiration
B. Backpressure
, C. Low turbulence
D. Pressure head
E. Pressure surges CORRECT ANSWER Aspiration
10. Water supply contamination from backflow may result in ?
A. A bad taste
B. Coloration
C. Death
D. Odor or smell
E. Pipe wall mineral deposit flaking CORRECT ANSWER Death
11. To prevent backflow, an atmospheric vacuum breaker is primarily designed to ?
A. Allow air into the outlet piping system
B. Create an elevation loop above ground
C. Introduce head loss
D. Prevent backpressure
E. Restrict velocity CORRECT ANSWER Allow air into the outlet piping system
12. Atmospheric vacuum breakers will typically be located on ?
A. Commercial irrigation systems
B. Fire-suppression systems
C. Plumbing fixtures or appliances
D. Utility storage tanks
E. Water service connections CORRECT ANSWER Plumbing fixtures or appliances
13. The mechanical component of an atmospheric vacuum breaker serves as an air-
inlet valve and a ?
A. Check valve
B. Regulating valve
C. Relief valve
D. Shut-off valve
E. Test port CORRECT ANSWER Check valve
Questions with Correct Answers 100% Pass
1. 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 CORRECT ANSWER Service Connection
2. 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 CORRECT ANSWER Repaired or Installed
3. A differential pressure gauge reading of 0.2 psid is represented on water column sight tu
be 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) CORRECT ANSWER 5.5 in. (14 cm)
4. Pollution of a public water supply suggests the substance in the water is ?
A. Aesthetically bad
B. Biological with virus only
C. Lowering the pH below 1.4
D. Radiological
E. Toxic CORRECT ANSWER Aesthetically bad
,5. Backsiphonage may occur when the pressure inside copper tubing is ?
A. Greater than atmospheric pressure
B. Greater than barometric pressure
C. Greater than 0 gauge pressure
D. Less than absolute pressure
E. Less than atmospheric pressure CORRECT
ANSWER Less than atmospheric pressure
6. A cross-connection may be a permanent piping arrangement or a(n) ?
A. Backflow preventer
B. Church symbol
C. OSHA hazardous area designation
D. Railroad and highway intersection sign
E. Temporary hose bibb connection CORRECT
ANSWER Temporary hose bibb connection
7. The isolation of a plumbing water system hazard requires ?
A. Appliance protection
B. Building quarantine
C. High-hazard protection
D. Meter protection
E. Toxin monitoring CORRECT ANSWER Appliance protection
8. A direct cross-connection suggests the piping system may be subjected to ?
A. Backpressure or backsiphonage
B. Backsiphonage only
C. Periodic inspection
D. Sustained pressure
E. Toxic materials CORRECT ANSWER Backpressure or backsiphonage
9. A pipe restriction's flow velocity increase may allow ?
A. Aspiration
B. Backpressure
, C. Low turbulence
D. Pressure head
E. Pressure surges CORRECT ANSWER Aspiration
10. Water supply contamination from backflow may result in ?
A. A bad taste
B. Coloration
C. Death
D. Odor or smell
E. Pipe wall mineral deposit flaking CORRECT ANSWER Death
11. To prevent backflow, an atmospheric vacuum breaker is primarily designed to ?
A. Allow air into the outlet piping system
B. Create an elevation loop above ground
C. Introduce head loss
D. Prevent backpressure
E. Restrict velocity CORRECT ANSWER Allow air into the outlet piping system
12. Atmospheric vacuum breakers will typically be located on ?
A. Commercial irrigation systems
B. Fire-suppression systems
C. Plumbing fixtures or appliances
D. Utility storage tanks
E. Water service connections CORRECT ANSWER Plumbing fixtures or appliances
13. The mechanical component of an atmospheric vacuum breaker serves as an air-
inlet valve and a ?
A. Check valve
B. Regulating valve
C. Relief valve
D. Shut-off valve
E. Test port CORRECT ANSWER Check valve
