BACKFLOW EXAM 2026 COMPLETE STUDY
GUIDE WITH FULL SOLUTIONS
◉ 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. Answer: 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. Answer: 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. Answer: . 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. Answer: 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. Answer: 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. Answer: 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. Answer: 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
, E. Retain water pressure downstream of the check valve. Answer:
Retain water pressure downstream of the check valve
◉ If not marked, a pressure vacuum breaker's critical level is ____?
A. At the bottom of the valve body
B. Measured from the check valve inlet
C. Measured from the body outlet
D. Not important
E. The air-inlet valve opening. Answer: At the bottom of the valve
body
◉ A pressure vacuum breaker may have ____ on the assembly's
discharge piping.
A. Auxiliary water supply looped irrigation
B. A boiler
C. A booster pump
D. Elevated piping
E. Irrigation sprinkler heads. Answer: Irrigation sprinkler heads
◉ The minimum loading to open a pressure vacuum breaker's air-
inlet valve is ____?
A. 1 psi (6.89 kPa)
B. 2 psi (13.8 kPa)
GUIDE WITH FULL SOLUTIONS
◉ 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. Answer: 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. Answer: 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. Answer: . 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. Answer: 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. Answer: 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. Answer: 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. Answer: 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
, E. Retain water pressure downstream of the check valve. Answer:
Retain water pressure downstream of the check valve
◉ If not marked, a pressure vacuum breaker's critical level is ____?
A. At the bottom of the valve body
B. Measured from the check valve inlet
C. Measured from the body outlet
D. Not important
E. The air-inlet valve opening. Answer: At the bottom of the valve
body
◉ A pressure vacuum breaker may have ____ on the assembly's
discharge piping.
A. Auxiliary water supply looped irrigation
B. A boiler
C. A booster pump
D. Elevated piping
E. Irrigation sprinkler heads. Answer: Irrigation sprinkler heads
◉ The minimum loading to open a pressure vacuum breaker's air-
inlet valve is ____?
A. 1 psi (6.89 kPa)
B. 2 psi (13.8 kPa)
