BACKFLOW PREVENTION 2026 EXAMINERS
QUESTIONS AND ANSWERS SURE A+
✔✔Confined space air monitors will sound if the oxygen percentage is less than
_____%.
A. 18.0
B. 18.5
C. 19.0
D. 19.5
E. 20.0 - ✔✔19.5
✔✔An irrigation sprinkler with chemical injection will require a(n) _____?
A. Air-gap separation
B. Atmospheric vacuum breaker
C. Double check valve assembly
D. Pressure vacuum breaker assembly
E. Reduced pressure principle assembly - ✔✔Reduced pressure principle assembly
✔✔While obtaining a reduced pressure principle assembly's relief valve opening point
using a high and low-pressure hose, turning the gauge valve more than 1/4 turn
indicates a leaking _____?
A. Check valve
B. Gauge Valve
, C. Relief valve
D. Shut-off valve
E. Test cock - ✔✔Shut-off valve
✔✔A reduced pressure principle assembly check valve number 1 is field-tested _____?
A. In the direction of flow only
B. Under backpressure
C. Under backsiphonage
D. Under backpressure and the direction of flow
E. Under backpressure and backsiphonage - ✔✔In the direction of flow only
✔✔A thrust block is designed to ____?
A. Adjust pressure changes
B. Maintain pipe joint integrity
C. Stop backflow
D. Stop water hammer
E. Support failing soil conditions - ✔✔Maintain pipe joint integrity
✔✔Water hauling truck fill stations should have either an air-gap separation or a(n)
_____?
A. Atmospheric vacuum breaker
B. Double check valve assembly
C. Dual check valve
D. Pressure vacuum breaker assembly
E. Reduced pressure principle assembly - ✔✔Reduced pressure principle assembly
✔✔When testing a reduced pressure principle assembly using three hoses, a difference
between the apparent and actual reading is likely due to _____?
A. Backflow
B. Check valve failure
C. Disc compression
D. A leaking shut-off valve
E. Opening of the bypass control valve - ✔✔A leaking shut-off valve
✔✔The plumbing code requires that a spill-resistant vacuum breaker be installed above
the highest use by at least _____?
A. 3 in. (7.6 cm)
B. 6 in. (15 cm)
C. 9 in. (23 cm)
D. 12 in (30 cm)
E. 18 in. (46 cm) - ✔✔12 in (30 cm)
✔✔Modifications of any kind to a backflow preventer will _____?
A. Alter its head loss
B. Render it inoperable
QUESTIONS AND ANSWERS SURE A+
✔✔Confined space air monitors will sound if the oxygen percentage is less than
_____%.
A. 18.0
B. 18.5
C. 19.0
D. 19.5
E. 20.0 - ✔✔19.5
✔✔An irrigation sprinkler with chemical injection will require a(n) _____?
A. Air-gap separation
B. Atmospheric vacuum breaker
C. Double check valve assembly
D. Pressure vacuum breaker assembly
E. Reduced pressure principle assembly - ✔✔Reduced pressure principle assembly
✔✔While obtaining a reduced pressure principle assembly's relief valve opening point
using a high and low-pressure hose, turning the gauge valve more than 1/4 turn
indicates a leaking _____?
A. Check valve
B. Gauge Valve
, C. Relief valve
D. Shut-off valve
E. Test cock - ✔✔Shut-off valve
✔✔A reduced pressure principle assembly check valve number 1 is field-tested _____?
A. In the direction of flow only
B. Under backpressure
C. Under backsiphonage
D. Under backpressure and the direction of flow
E. Under backpressure and backsiphonage - ✔✔In the direction of flow only
✔✔A thrust block is designed to ____?
A. Adjust pressure changes
B. Maintain pipe joint integrity
C. Stop backflow
D. Stop water hammer
E. Support failing soil conditions - ✔✔Maintain pipe joint integrity
✔✔Water hauling truck fill stations should have either an air-gap separation or a(n)
_____?
A. Atmospheric vacuum breaker
B. Double check valve assembly
C. Dual check valve
D. Pressure vacuum breaker assembly
E. Reduced pressure principle assembly - ✔✔Reduced pressure principle assembly
✔✔When testing a reduced pressure principle assembly using three hoses, a difference
between the apparent and actual reading is likely due to _____?
A. Backflow
B. Check valve failure
C. Disc compression
D. A leaking shut-off valve
E. Opening of the bypass control valve - ✔✔A leaking shut-off valve
✔✔The plumbing code requires that a spill-resistant vacuum breaker be installed above
the highest use by at least _____?
A. 3 in. (7.6 cm)
B. 6 in. (15 cm)
C. 9 in. (23 cm)
D. 12 in (30 cm)
E. 18 in. (46 cm) - ✔✔12 in (30 cm)
✔✔Modifications of any kind to a backflow preventer will _____?
A. Alter its head loss
B. Render it inoperable
