BACKFLOW PREVENTION PRACTICE EXAM ACTUAL QUESTIONS
AND VERIFIED ANSWERS GRADED A+
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
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
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)
5.5 in. (14 cm)
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
Aesthetically bad
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
Less than atmospheric pressure
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
Temporary hose bibb connection
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
Appliance protection
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
Backpressure or backsiphonage
A pipe restriction's flow velocity increase may allow ____?
A. Aspiration
B. Backpressure
C. Low turbulence
D. Pressure head
E. Pressure surges
, Aspiration
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
Death
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
Allow air into the outlet piping system
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
Plumbing fixtures or appliances
AND VERIFIED ANSWERS GRADED A+
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
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
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)
5.5 in. (14 cm)
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
Aesthetically bad
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
Less than atmospheric pressure
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
Temporary hose bibb connection
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
Appliance protection
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
Backpressure or backsiphonage
A pipe restriction's flow velocity increase may allow ____?
A. Aspiration
B. Backpressure
C. Low turbulence
D. Pressure head
E. Pressure surges
, Aspiration
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
Death
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
Allow air into the outlet piping system
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
Plumbing fixtures or appliances
