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BACKFLOW PREVENTION ASSEMBLY TESTER EXAM
NEWEST 2024 ACTUAL EXAM COMPLETE 100
QUESTIONS & CORRECT DETAILED
ANSWERS|GRADED A+
A backflow preventer creates a closed plumbing system that requires the installation of
a(n) _____?
A
...
Globe valve
C
...
Temperature and pressure relief valve
E
...
7 m) above the highest ____?
A
...
Fixture outlet
C
...
Service connection
E
...
8 psid (5
...
A passing check valve
B
...
Debris in the check seat
D
...
Low water pressure - ANSDisc softening or decay
A common backflow preventer on a double-wall heat exchanger with leak detection is
____?
A
...
An atmospheric vacuum breaker
C
...
A reduced pressure principle assembly
E
...
Backflow preventer
B
...
OSHA hazardous area designation
D
...
Temporary hose bibb connection - ANSTemporary hose bibb connection
A deck-mounted atmospheric vacuum breaker's critical installation level is above the
outlet usage by ___?

A
...
(2
...
3 in
...
6 cm)
C
...
(15 cm)
D
...
(30 cm)
E
...
(46 cm) - ANS1 in
...
5 cm)
A differential pressure gauge reading of 0
...
1/16 in
...
16 cm)
B
...
(1
...
2 in
...
1 cm)
D
...
5 in
...
9 cm)
E
...
5 in
...
5 in
...
Backpressure or backsiphonage
B
...
Periodic inspection
D
...
Toxic materials - ANSBackpressure or backsiphonage
A double check valve assembly installed in a vertical flow down orientation is only
allowed ______?
A
...
If the assembly was tested and approved as such
C
...
On fire-suppression systems
E
...
(30
...
Electrical code compliance
B
...
Maintenance
D
...
Rodent control - ANSMaintenance
A field test report for a double check valve assembly will include the manufacturer's
name, model, size, and _____?
A
...
Date of manufacture
C
...
Working pressure (maximum)
E
...
An air-gap separation
B
...
A reduced pressure principle assembly
D
...
No protection required - ANSA double check valve assembly
A hose connection vacuum breaker's maintenance includes _____?
A
...
Diaphragm replacement
C
...
Replacement every 2 years
E
...
Atmospheric vacuum breaker
B
...
Pressure vacuum breaker
D
...
Spill-resistant vacuum breaker - ANSAtmospheric vacuum breaker
A low-hazard use only backflow preventer is a(n) _____?
A
...
Atmospheric vacuum breaker
C
...
Pressure vacuum breaker assembly
E
...
Aspiration
B
...
Low turbulence
D
...
Pressure surges - ANSAspiration
A pressure vacuum breaker may have ____ on the assembly's discharge piping
...
Auxiliary water supply looped irrigation
B
...
A booster pump
D
...
Irrigation sprinkler heads - ANSIrrigation sprinkler heads
A properly installed barometric loop will prevent _____?
A
...
Backsiphonage

C
...
Leakage
E
...
Dual check valve
B
...
Double check valve assembly
D
...
Reduced pressure principle assembly - ANSReduced pressure principle assembly
A reduced pressure principle assembly check valve number 1 is field-tested _____?
A
...
Under backpressure
C
...
Under backpressure and the direction of flow
E
...
Soft-seated check upstream of the assembly
B
...
Difference between the check valve 1 loading and the relief valve opening point
D
...
Sum of the check valve 1 loading and the relief valve divided by 2 - ANSDifference
between the check valve 1 loading and the relief valve opening point
A reduced pressure principle assembly's continuous discharge from a relief valve and a
gauge reading of 4 psid to 5 psid may indicate _____?
A
...
Debris fouling check valve number 1
C
...
Leakage through the diaphragm
E
...
Push the valve away from its seat
B
...
Remain closed with any zone pressure
D
...
Sustain all water hammer conditions - ANSPush the valve away from its seat
A spool is used to connect a ____?
A
...
Copper and PVC pipe
C
...
Potable and non-potable system
E
...
Backflow preventer
B
...
Expensive elbow
D
...
Useful training photo - ANS
...
Admit air into the downstream piping
B
...
Discharge water
D
...
Retain water pressure downstream of the check valve - ANSRetain water pressure
downstream of the check valve
A swing connection is a type of _____?
A
...
Cross-connection
C
...
Gauge component
E
...
Adjust pressure changes
B
...
Stop backflow
D
...
Support failing soil conditions - ANSMaintain pipe joint integrity
A water closet ball cock must be installed above the opening of the overflow pipe by at
least _____?
A
...
0 in
...
5 cm)
B
...
5 in
...
8 cm)
C
...
0 in
...
1 cm)
D
...
5 in
...
4 cm)
E
...
0 in
...
6 cm) - ANS1
...
(2
...
Backpressure
B
...
Gauge pressure differential

D
...
Static condition - ANSBackpressure
According to ANSI standard, potable water pipe marking requirements are _____
lettering
...
Blue background with white
B
...
Green background with yellow
D
...
White background with green - ANSGreen background with white
After the repair of a double check valve assembly, a field test is required for the _____?
A
...
Component repaired
C
...
Tester's personal records only
E
...
Classified
B
...
Laboratory listed
D
...
Tested with a sight tube - ANSInspected annually
An air-gap separation is mandatory between the potable supply and a(n) _____?
A
...
Isolation assembly
C
...
Sanitary sewer
E
...
Build drain
B
...
Indirect drain outlet
D
...
Stationary sensor - ANSRelief valve discharge
An air-gap separation will tend to _____?
A
...
Allow air to backpressure instead of liquid
C
...
Generate a whistle to warn of a siphon
E
...
High hazard/backsiphonage
B
...
Low hazard/backsiphonage
D
...
High or low hazard/backsiphonage only - ANSHigh or low hazard/backsiphonage
only
An atmospheric vacuum breaker is not required to have a(n) _____?
A
...
Installation elevation
C
...
Label
E
...
Air-inlet valve leakage
B
...
Chatter or noise during flow
D
...
Spring elongation - ANSChatter or noise during flow
An indirect cross-connection suggests the system may be subject to ____?
A
...
Backpressure
C
...
A meniscus
E
...
Air-gap separation
B
...
Double check valve assembly
D
...
Reduced pressure principle assembly - ANSReduced pressure principle assembly
Atmospheric vacuum breakers must not be subject to continuous water pressure for
more than ___ hr
...
3
B
...
12
D
...
24 - ANS12
Atmospheric vacuum breakers will typically be located on ____?

A
...
Fire-suppression systems
C
...
Utility storage tanks
E
...
Installed
B
...
Repaired or Installed
D
...
Water suppliers provide notice - ANSRepaired or Installed
Backpressure to a reduced pressure principle assembly fouled check valve number 2
will likely _____?
A
...
Force the relief valve to open and discharge
C
...
Push the check valve closed
E
...
Greater than atmospheric pressure
B
...
Greater than 0 gauge pressure
D
...
Less than atmospheric pressure - ANSLess than atmospheric pressure
Before testing a backflow preventer, the test cocks are flushed primarily to _____?
A
...
Create a water flow condition
C
...
Reduce pressure differentials
E
...
Begin completing the test report form
B
...
Obtain a repair kit
D
...
Provide notice to the fire department - ANSObtain permission to shut-down the water
service
Confined space air monitors will sound if the oxygen percentage is less than _____%
...
18
...
18
...
19
...
19
...
20
...
5
Containing a plumbing system from the public water supply requires backflow protection
at the _______?
A
...
Building foundation
C
...
Service Connection
E
...
Backpressure backflow
B
...
A failed air-inlet valve
D
...
A leaking or damaged shut-off valve 1 - ANSBackpressure backflow
Double check detector assembly flow indicators must register flow up to _____?
A
...
8 l/min)
B
...
6 l/min)
C
...
4 l/min)
D
...
1 l/min)
E
...
9 l/min) - ANS2 gpm (7
...
Bronze
B
...
Plastic
D
...
Spring activated - ANSIndependently acting
Double check valve assembly product performance standards require venting for
_____?
A
...
Test cock corrosion
C
...
Vertical installations
E
...
Closed tank
B
...
Submerged inlet
D
...
Valve - ANSValve
Gauges used for field tests of backflow preventers must have the calibration checked
____?
A
...
Annually
C
...
If used in temperature extremes
E
...
A high-pressure gauge control valve
B
...
Test cock number 1
D
...
Test cock number 3 - ANSTest cock number 1
If a reduced pressure principle assembly's relief valve opens at a differential pressure of
5
...
Brushing or stem is worn
B
...
Dirty or damaged relief valve seat or disc
D
...
Misaligned or broken relief valve spring - ANSDirty or damaged relief valve seat or
disc
If not marked, a pressure vacuum breaker's critical level is ____?
A
...
Measured from the check valve inlet
C
...
Not important
E
...
A leaking shut-off valve 2 with a parallel installation
B
...
The check valve is failed
D
...
The test cock is open - ANSA leaking shut-off valve 2 with a parallel installation
If testing a backflow preventer using a differential gauge and a single hose, it is
important to ____?

A
...
Maintain the gauge and hose connections at the same height as the assembly
C
...
Open the low-pressure and bypass control valves
E
...
24 in
...
28 in
...
32 in
...
36 in
...
40 in
...
(71 cm)
Intermittent relief valve discharge from a reduced pressure principle assembly is
probably caused by _____?
A
...
A fouled check valve number 2
C
...
A partially closed shut-off valve number 2
E
...
Alter its head loss
B
...
Require a tester failure
D
...
Void its approval - ANSVoid its approval
New backflow prevention assemblies should be tested ____?
A
...
Before the expiration of the warranty
C
...
In the presence of a plumbing inspector
E
...
100 degrees F (38 degrees C)
B
...
140 degrees F (60 degrees C)
D
...
210 degrees F (99 degrees C) - ANS110 degrees F (43 degrees C)
Plumbing codes require that water system pressures do not exceed ____?
A
...
60 psi (414 kPa)
C
...
100 psi (690 kPa)
E
...
Aesthetically bad
B
...
Lowering the pH below 1
...
Radiological
E
...
0
...
99 kPa)
B
...
50 psi (3
...
1
...
89 kPa)
D
...
0 psi (13
...
2
...
9 kPa) - ANS0
...
99 kPa)
Pressure vacuum breaker shut-off valves and test cocks will avoid freeze damage if
winterized by ____?
A
...
Rotating ball valve handles to 45 degree angle
C
...
Removing the assembly's internal components
E
...

A
...
Gate
C
...
Regulating
E
...
High hazard/backsiphonage
B
...
Low hazard/backpressure
D
...
Low hazard/intermittent pressure - ANSLow hazard/backpressure
Prior to testing the check valves in the direction of flow on a double check valve
assembly using a high and low side on the gauge, a tester must first ____?
A
...
Notify the owner of the water shut-off

C
...
Submit the test report to the water supply
E
...
Discharge pipe's outer diameter
B
...
Fixture inlet diameter
D
...
Service connection size - ANSEffective opening
The air-inlet valve of an atmospheric vacuum breaker is help closed by____?
A
...
Cotter pins
C
...
Spring tension
E
...
Commercial boilers
B
...
Hose bibbs
D
...
Swimming pool chlorinators - ANSLow-pressure residential boilers
The force needed to close a check valve in a dual check is _____?
A
...
9 kPa)
B
...
9 kPa)
C
...
7 kPa)
D
...
6 kPa)
E
...
5 kPa) - ANS1 psid (6
...
Appliance protection
B
...
High-hazard protection
D
...
Toxin monitoring - ANSAppliance protection
The maximum protection provided by a reduced pressure principle assembly is ____?
A
...
High hazard/backsiphonage
C
...
Low hazard/backpressure

E
...
Check valve
B
...
Relief valve
D
...
Test port - ANSCheck valve
The minimum loading to open a pressure vacuum breaker's air-inlet valve is ____?
A
...
89 kPa)
B
...
8 kPa)
C
...
7 kPa)
D
...
6 kPa)
E
...
5 kPa) - ANS1 psi (6
...
3 in
...
6 cm)
B
...
(15 cm)
C
...
(23 cm)
D
...
18 in
...
Create a pressure head increase
B
...
Provide water pressure to the relief valve diaphragm
D
...
Sustain the assembly's buffer - ANSCreate a reduction in water pressure
The recorded value of a pressure vacuum breaker check valve is determined when
____?
A
...
The high-bleed valve is opened
C
...
Water stops flowing from test cock 1
E
...
1 psid (6
...
2 psid (13
...
3 psid (20
...
4 psid (27
...
5 psid (34
...
9 kPa)
To prevent backflow, an atmospheric vacuum breaker is primarily designed to ____?
A
...
Create an elevation loop above ground
C
...
Prevent backpressure
E
...
Atmosphere
B
...
Pressure tank
D
...
Sanitary sewer - ANSAtmosphere
Two valves of a five-valve differential pressure gauge are used to ____?
A
...
Compensate for leaks
C
...
Reset the gauge calibration
E
...
0 psi absolute
B
...
0 psi gauge
D
...
Vapor pressure - ANS0 psi atmospheric
Water hauling truck fill stations should have either an air-gap separation or a(n) _____?
A
...
Double check valve assembly
C
...
Pressure vacuum breaker assembly
E
...
A bad taste
B
...
Death
D
...
Pipe wall mineral deposit flaking - ANSDeath

When a piping discharge is near a wall, the air-gap separation must be increased an
additional ____ pipe diameter(s)
...
1
B
...
3
D
...
5 - ANS1
When a reduced pressure principle assembly is installed vertically, the relief valve
discharge must be _____?
A
...
Higher than check valve number 1
C
...
Lower than check valve number 2
E
...
Check valve number 1 to open
B
...
No flow from the test cock
D
...
Relief valve discharge - ANSRelief valve discharge
When close to two intersecting walls, an air-gap separation is increased from 2
diameters to _____ diameters
...
2
...
3
C
...
5
D
...
4
...
Failures in outlet valves are determined first
B
...
The potential of backflow during the test is eliminated
D
...
Water pressure will be maintained for testing - ANSWater pressure will be maintained
for testing
When testing a reduced pressure principle assembly using three hoses, a difference
between the apparent and actual reading is likely due to _____?
A
...
Check valve failure
C
...
A leaking shut-off valve
E
...
Atomospheric pressure decreases
B
...
Gauge pressure increases
D
...
Water temperature lowers - ANSGauge pressure decreases
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
...
Gauge Valve
C
...
Shut-off valve
E
...
0
...
(1
...
1
...
(2
...
1
...
(3
...
2
...
(5
...
3
...
(7
...
0 in
...
5 cm)



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