BACKFLOW PREVENTION ACTUAL
QUESTIONS AND VERIFIED ANSWERS
COMPLETE STUDY PACK
●● 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)
,●● 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
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
Answer: 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
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
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
Answer: 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
Answer: 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
Answer: 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
QUESTIONS AND VERIFIED ANSWERS
COMPLETE STUDY PACK
●● 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)
,●● 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
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
Answer: 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
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
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
Answer: 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
Answer: 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
Answer: 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
