BACKFLOW PREVENTION CORE MAIN EXAM
QUESTIONS AND ANSWERS SURE A+
✔✔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
C. 12
D. 18
E. 24 - ✔✔12
, ✔✔A submerged atmospheric vacuum breaker may be considered a(n) _____?
A. Backflow preventer
B. Cross-connection
C. Expensive elbow
D. Typical installation
E. Useful training photo - ✔✔. Cross-connection
✔✔Flow from the outlet of an atmospheric vacuum breaker must not reach a _____?
A. Closed tank
B. Section of straight tubing
C. Submerged inlet
D. Toxic substance
E. Valve - ✔✔Valve
✔✔An atmospheric vacuum breaker is not required to have a(n) _____?
A. Annual field test
B. Installation elevation
C. Installation inspection
D. Label
E. Usage limitaion - ✔✔Annual field test
✔✔The air-inlet valve of an atmospheric vacuum breaker is help closed by____?
A. Atmospheric pressure
B. Cotter pins
C. Gravity
D. Spring tension
E. Water pressure - ✔✔Water pressure
✔✔Pressure vacuum breaker shut-off valves and test cocks will avoid freeze damage if
winterized by ____?
A. Leaving all valves fully open
B. Rotating ball valve handles to 45 degree angle
C. Purging the body with compressed air
D. Removing the assembly's internal components
E. Removing shut-off valve and test cock operators - ✔✔Rotating ball valve handles to
a 45 degree angle
✔✔A supply pressure loss with a functional check valve will cause a pressure vacuum
breaker to ____?
A. Admit air into the downstream piping
B. Be subject to backpressure
C. Discharge water
D. Fail
QUESTIONS AND ANSWERS SURE A+
✔✔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
C. 12
D. 18
E. 24 - ✔✔12
, ✔✔A submerged atmospheric vacuum breaker may be considered a(n) _____?
A. Backflow preventer
B. Cross-connection
C. Expensive elbow
D. Typical installation
E. Useful training photo - ✔✔. Cross-connection
✔✔Flow from the outlet of an atmospheric vacuum breaker must not reach a _____?
A. Closed tank
B. Section of straight tubing
C. Submerged inlet
D. Toxic substance
E. Valve - ✔✔Valve
✔✔An atmospheric vacuum breaker is not required to have a(n) _____?
A. Annual field test
B. Installation elevation
C. Installation inspection
D. Label
E. Usage limitaion - ✔✔Annual field test
✔✔The air-inlet valve of an atmospheric vacuum breaker is help closed by____?
A. Atmospheric pressure
B. Cotter pins
C. Gravity
D. Spring tension
E. Water pressure - ✔✔Water pressure
✔✔Pressure vacuum breaker shut-off valves and test cocks will avoid freeze damage if
winterized by ____?
A. Leaving all valves fully open
B. Rotating ball valve handles to 45 degree angle
C. Purging the body with compressed air
D. Removing the assembly's internal components
E. Removing shut-off valve and test cock operators - ✔✔Rotating ball valve handles to
a 45 degree angle
✔✔A supply pressure loss with a functional check valve will cause a pressure vacuum
breaker to ____?
A. Admit air into the downstream piping
B. Be subject to backpressure
C. Discharge water
D. Fail
