Backflow Prevention Practice Exam GRADE A+ SOLUTIONS

Backflow Prevention Practice Exam
GRADE A+ SOLUTIONS

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
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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
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
Check valve
A deck-mounted atmospheric vacuum breaker's critical installation
level is above the outlet usage by ___?
A. 1 in. (2.5 cm)
B. 3 in. (7.6 cm)
C. 6 in. (15 cm)
D. 12 in. (30 cm)
E. 18 in. (46 cm)
1 in. (2.5 cm)
A hose-bibb connection is required to have a permanently installed
____?
A. Atmospheric vacuum breaker
B. Backflow preventer
C. Pressure vacuum breaker
D. Shut-off valve
E. Spill-resistant vacuum breaker
Atmospheric vacuum breaker
Atmospheric vacuum breakers must not be subject to continuous water
pressure for more than ___ hr.
A. 3
B. 6