2026 BACKFLOW PREVENTION EXAM
QUESTIONS AND CORRECT ANSWERS |
A+ GRADE VERIFIED
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
Correct 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
Correct 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 Correct 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 Correct 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)
C. 3 psi (20.7 kPa)
D. 4 psi (27.6 kPa)
E. 5psi (34.5 kPa) Correct Answer 1 psi (6.89 kPa)
The recorded value of a pressure vacuum breaker check
valve is determined when ____?
A. Both shut-off valves are closed
B. The high-bleed valve is opened
C. The air-inlet valve opens
D. Water stops flowing from test cock 1
E. Water stops flowing from test cock 2 Correct Answer
Water stops flowing from test cock 2
, Pressure vacuum breaker shut-off valves must be _____
valves.
A. Angle
B. Gate
C. Globe
D. Regulating
E. Tightly closed Correct Answer Tightly closed
An indication that a pressure vacuum breaker is
undersized for its application is _____?
A. Air-inlet valve leakage
B. Bonnet distortion
C. Chatter or noise during flow
D. Disc pitting
E. Spring elongation Correct Answer Chatter or noise
during flow
Continuous flow from a pressure vacuum breaker's test
cock 2 with shut-off valve 2 open and shut-off valve 1
closed is an indication of _____?
A. Backpressure backflow
B. Backsiphonage backflow
C. A failed air-inlet valve
D. A leaking check valve
E. A leaking or damaged shut-off valve 1 Correct Answer
Backpressure backflow
Pressure vacuum breakers may be used on the following
applications except ____?
A. High hazard/backsiphonage
B. High hazard/continuous pressure
QUESTIONS AND CORRECT ANSWERS |
A+ GRADE VERIFIED
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
Correct 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
Correct 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 Correct 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 Correct 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)
C. 3 psi (20.7 kPa)
D. 4 psi (27.6 kPa)
E. 5psi (34.5 kPa) Correct Answer 1 psi (6.89 kPa)
The recorded value of a pressure vacuum breaker check
valve is determined when ____?
A. Both shut-off valves are closed
B. The high-bleed valve is opened
C. The air-inlet valve opens
D. Water stops flowing from test cock 1
E. Water stops flowing from test cock 2 Correct Answer
Water stops flowing from test cock 2
, Pressure vacuum breaker shut-off valves must be _____
valves.
A. Angle
B. Gate
C. Globe
D. Regulating
E. Tightly closed Correct Answer Tightly closed
An indication that a pressure vacuum breaker is
undersized for its application is _____?
A. Air-inlet valve leakage
B. Bonnet distortion
C. Chatter or noise during flow
D. Disc pitting
E. Spring elongation Correct Answer Chatter or noise
during flow
Continuous flow from a pressure vacuum breaker's test
cock 2 with shut-off valve 2 open and shut-off valve 1
closed is an indication of _____?
A. Backpressure backflow
B. Backsiphonage backflow
C. A failed air-inlet valve
D. A leaking check valve
E. A leaking or damaged shut-off valve 1 Correct Answer
Backpressure backflow
Pressure vacuum breakers may be used on the following
applications except ____?
A. High hazard/backsiphonage
B. High hazard/continuous pressure
