BACKFLOW PREVENTION PRACTICE EXAM AND CORRECT
ANSWERS
Containing a plumbing system from the public water supply requires backow protection
at the _______?
A. Appliance or xture
B. Building foundation
C. Irrigation system
D. Service Connection
E. Sprinkler riser
Correct answer: Service Connection
Backow preventer manufacturers recommend that assemblies be eld-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
A dierential 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)
Correct answer: 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
Correct answer: 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
Correct answer: Less than atmospheric pressure
A cross-connection may be a permanent piping arrangement or a(n) ____?
A. Backow 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
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
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
A pipe restriction's ow velocity increase may allow ____?
A. Aspiration
B. Backpressure
C. Low turbulence
D. Pressure head
E. Pressure surges
Correct answer: Aspiration
, Water supply contamination from backow may result in ____?
A. A bad taste
B. Coloration
C. Death
D. Odor or smell
E. Pipe wall mineral deposit aking
Correct answer: Death
To prevent backow, 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
Atmospheric vacuum breakers will typically be located on ____?
A. Commercial irrigation systems
B. Fire-suppression systems
C. Plumbing xtures or appliances
D. Utility storage tanks
E. Water service connections
Correct answer: Plumbing xtures or appliances
The mechanical component of an atmospheric vacuum breaker serves as an air-inlet valve
and a ____?
ANSWERS
Containing a plumbing system from the public water supply requires backow protection
at the _______?
A. Appliance or xture
B. Building foundation
C. Irrigation system
D. Service Connection
E. Sprinkler riser
Correct answer: Service Connection
Backow preventer manufacturers recommend that assemblies be eld-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
A dierential 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)
Correct answer: 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
Correct answer: 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
Correct answer: Less than atmospheric pressure
A cross-connection may be a permanent piping arrangement or a(n) ____?
A. Backow 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
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
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
A pipe restriction's ow velocity increase may allow ____?
A. Aspiration
B. Backpressure
C. Low turbulence
D. Pressure head
E. Pressure surges
Correct answer: Aspiration
, Water supply contamination from backow may result in ____?
A. A bad taste
B. Coloration
C. Death
D. Odor or smell
E. Pipe wall mineral deposit aking
Correct answer: Death
To prevent backow, 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
Atmospheric vacuum breakers will typically be located on ____?
A. Commercial irrigation systems
B. Fire-suppression systems
C. Plumbing xtures or appliances
D. Utility storage tanks
E. Water service connections
Correct answer: Plumbing xtures or appliances
The mechanical component of an atmospheric vacuum breaker serves as an air-inlet valve
and a ____?
