Practice 2025/2026Exam With Verified Questions And
Detailed Correct Answers.
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 - ANSWER-
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 - ANSWER-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) - ANSWER-12 in (30 cm)
Modifications of any kind to a backflow preventer will
_____?
A. Alter its head loss
B. Render it inoperable
C. Require a tester failure
D. Validate its warranty
E. Void its approval - ANSWER-Void its approval
, A water system pressure of 10 psi (69 kPa) and a
plumbing system pressure of 20 psi (138 kPa) may be
described as _____?
A. Backpressure
B. Backsiphonage
C. Gauge pressure differential
D. inflow/infiltration
E. Static condition - ANSWER-Backpressure
According to ANSI standard, potable water pipe marking
requirements are _____ lettering.
A. Blue background with white
B. Green background with white
C. Green background with yellow