BACKFLOW PREVENTION ASSEMBLY TESTER ACTUAL
EXAM LATEST 2024/2025 QUESTIONS AND VERIFIED
CORRECT ANSWERS/ ALREADY GRADED A ++
Back siphonage - ANSWER A backflow condition in which the pressure in
the distribution system is less than atmospheric pressure (subatmospheric)
Auxiliary Supply (Reclaimed Water) - ANSWER Any water source or
system, other than the potable water supply, that may be available in the
building or premise.
Internal Protection - ANSWER The backflow device at the point of use
How much does 1 cubic foot of water weigh - ANSWER 62.4 pounds
How much does one gallon of water weigh - ANSWER 8.3 pounds
An RP is not required at the service connection of - ANSWER A single
family dwelling
A perfect vacuum a see level will raise the water level in a pipe a maximum
of - ANSWER 33.9 feet
A mixture of air and gas is considered to become hazardous when it
exceeds ___ of the lower explosive limit - ANSWER 10%
Vacuum - ANSWER Any pressure less than that exerted by the
atmosphere
Backpressure & Back siphonage - ANSWER Backflow occurs because of
what two things
maximum distance that an absolute vacuum breaker at sea level will lift a
column of water is - ANSWER 33.9 feet
This amount of absolute pressure could cause back siphonage to occur in
a hydraulic system - ANSWER 10.5 psia
,When testing DC and the #2 check valve is leaking you must - ANSWER
Repair the #2 check
Each check valve on a DC is designed to hold - ANSWER 1.0 psid
Maximum absolute pressure loss for a DC is - ANSWER 10 psi
Air Inlet on a PVB must open at or above - ANSWER 1 psid
When testing the PVB, the air inlet opens upon closing the #1 SOV this is
because the - ANSWER #2 SOV is leaking
When testing the SVB, the guage goes to 0 after closing the #1 SOV. This
is because - ANSWER the check is fouled
An oxygen-deficient atmosphere contains less than _____ percent oxygen.
- ANSWER 19.5%
An unprotected bypass on an RP - ANSWER is not allowed
The guage used for testing backflow prevention reads in - ANSWER
minimum increments of .1 psid
In response of a backflow incident the water purveyor should - ANSWER
implement the Emergency response Plan
Primary consideration when deciding on DC or RP - ANSWER Degree of
Hazard
When testing an RP, the #1 SOV - ANSWER is to be left open at all times
Containment Protection - ANSWER Protects all consumers on a Public
Water System
Vacuum - ANSWER Any pressure less than that exerted by the
atmosphere
When testing a PVB, the air inlet opens upon closing the #1 SOV -
ANSWER this is because the #2 SOV is leaking
,What absolute pressure could cause backsiphonage to occur in a hydraulic
system at sea level - ANSWER 10.5 psia.
What is an actual cross connection? - ANSWER Any arrangement of pipes,
fittings, or devices that connects a potable water supply directly to a non-
potable source at all times
What is an Air Gap? - ANSWER The unobstructed vertical distance through
the free atmosphere between the lowest opening from any pipe or outlet
supplying water to a tank, plumbing fixture, or other container, and the
overflow rim of that container
What does AVB stand for? - ANSWER Atmospheric Vacuum Breaker
What is an Atmospheric Vacuum Breaker? - ANSWER A mechanical
device consisting of a float check valve and an air-inlet port designed to
prevent backsiphonage
What is an auxiliary supply? - ANSWER Any water source or system, other
than the potable water supply, that may be available in the building or
premises
What is backflow? - ANSWER A hydraulic condition, caused by difference
in pressures, in which non-potable water or other fluids flow into a potable
water system
What is backpressure? - ANSWER A backflow condition in which a pump,
elevated tank, boiler, 0r other means results in a downstream pressure
greater than the supply pressure
What is backsiphange? - ANSWER A backflow condition in which the
pressure in the distribution system is less than atmospheric pressure (sub-
atmospheric)
What is a bypass? - ANSWER In cross-connection control, any pipe
arrangement that passes water around a protective device, casing it to be
ineffective
What is the purpose of a check valve? - ANSWER To allow flow in only one
direction
, What is a cross connection? - ANSWER Any arrangement of pipes, fittings,
fixtures, or devices that connects a non-potable system to a potable water
system
What does DCVA stand for? - ANSWER Double Check Valve Assembly
What is a DCVA? - ANSWER A testable mechanical device consisting of
two independently operating, spring-loaded check valves
What is an overflow level? - ANSWER The maximum height that water or
liquid will rise in a receptacle before it flows over the rim
What is a potable water source? - ANSWER Water that is biologically,
chemically, and radiologically safe to drink
What is a potential cross connection? - ANSWER Any arrangement of
pipes, fittings, or devices that indirectly connects a potable water supply to
a non-potable water source
What does PVB stand for? - ANSWER Pressure Vacuum Breaker
What is a PVB? - ANSWER A device designed to prevent backsiphonage,
consisting of once independently operating spring-loaded check valve and
an independently operating spring-loaded air-inlet valve
What does RPBP stand for? - ANSWER Reduced Pressure Backflow
Preventer
What does RPZBP stand for? - ANSWER Reduced Pressure Zone
Backflow Preventer
What is an RP? - ANSWER A mechanical device consisting of two
independently operating, spring-loaded check valves with a reduced
pressure zone between the check valves
Containment - ANSWER Protection on the service line - protects the
potable water supply and not the customer
EXAM LATEST 2024/2025 QUESTIONS AND VERIFIED
CORRECT ANSWERS/ ALREADY GRADED A ++
Back siphonage - ANSWER A backflow condition in which the pressure in
the distribution system is less than atmospheric pressure (subatmospheric)
Auxiliary Supply (Reclaimed Water) - ANSWER Any water source or
system, other than the potable water supply, that may be available in the
building or premise.
Internal Protection - ANSWER The backflow device at the point of use
How much does 1 cubic foot of water weigh - ANSWER 62.4 pounds
How much does one gallon of water weigh - ANSWER 8.3 pounds
An RP is not required at the service connection of - ANSWER A single
family dwelling
A perfect vacuum a see level will raise the water level in a pipe a maximum
of - ANSWER 33.9 feet
A mixture of air and gas is considered to become hazardous when it
exceeds ___ of the lower explosive limit - ANSWER 10%
Vacuum - ANSWER Any pressure less than that exerted by the
atmosphere
Backpressure & Back siphonage - ANSWER Backflow occurs because of
what two things
maximum distance that an absolute vacuum breaker at sea level will lift a
column of water is - ANSWER 33.9 feet
This amount of absolute pressure could cause back siphonage to occur in
a hydraulic system - ANSWER 10.5 psia
,When testing DC and the #2 check valve is leaking you must - ANSWER
Repair the #2 check
Each check valve on a DC is designed to hold - ANSWER 1.0 psid
Maximum absolute pressure loss for a DC is - ANSWER 10 psi
Air Inlet on a PVB must open at or above - ANSWER 1 psid
When testing the PVB, the air inlet opens upon closing the #1 SOV this is
because the - ANSWER #2 SOV is leaking
When testing the SVB, the guage goes to 0 after closing the #1 SOV. This
is because - ANSWER the check is fouled
An oxygen-deficient atmosphere contains less than _____ percent oxygen.
- ANSWER 19.5%
An unprotected bypass on an RP - ANSWER is not allowed
The guage used for testing backflow prevention reads in - ANSWER
minimum increments of .1 psid
In response of a backflow incident the water purveyor should - ANSWER
implement the Emergency response Plan
Primary consideration when deciding on DC or RP - ANSWER Degree of
Hazard
When testing an RP, the #1 SOV - ANSWER is to be left open at all times
Containment Protection - ANSWER Protects all consumers on a Public
Water System
Vacuum - ANSWER Any pressure less than that exerted by the
atmosphere
When testing a PVB, the air inlet opens upon closing the #1 SOV -
ANSWER this is because the #2 SOV is leaking
,What absolute pressure could cause backsiphonage to occur in a hydraulic
system at sea level - ANSWER 10.5 psia.
What is an actual cross connection? - ANSWER Any arrangement of pipes,
fittings, or devices that connects a potable water supply directly to a non-
potable source at all times
What is an Air Gap? - ANSWER The unobstructed vertical distance through
the free atmosphere between the lowest opening from any pipe or outlet
supplying water to a tank, plumbing fixture, or other container, and the
overflow rim of that container
What does AVB stand for? - ANSWER Atmospheric Vacuum Breaker
What is an Atmospheric Vacuum Breaker? - ANSWER A mechanical
device consisting of a float check valve and an air-inlet port designed to
prevent backsiphonage
What is an auxiliary supply? - ANSWER Any water source or system, other
than the potable water supply, that may be available in the building or
premises
What is backflow? - ANSWER A hydraulic condition, caused by difference
in pressures, in which non-potable water or other fluids flow into a potable
water system
What is backpressure? - ANSWER A backflow condition in which a pump,
elevated tank, boiler, 0r other means results in a downstream pressure
greater than the supply pressure
What is backsiphange? - ANSWER A backflow condition in which the
pressure in the distribution system is less than atmospheric pressure (sub-
atmospheric)
What is a bypass? - ANSWER In cross-connection control, any pipe
arrangement that passes water around a protective device, casing it to be
ineffective
What is the purpose of a check valve? - ANSWER To allow flow in only one
direction
, What is a cross connection? - ANSWER Any arrangement of pipes, fittings,
fixtures, or devices that connects a non-potable system to a potable water
system
What does DCVA stand for? - ANSWER Double Check Valve Assembly
What is a DCVA? - ANSWER A testable mechanical device consisting of
two independently operating, spring-loaded check valves
What is an overflow level? - ANSWER The maximum height that water or
liquid will rise in a receptacle before it flows over the rim
What is a potable water source? - ANSWER Water that is biologically,
chemically, and radiologically safe to drink
What is a potential cross connection? - ANSWER Any arrangement of
pipes, fittings, or devices that indirectly connects a potable water supply to
a non-potable water source
What does PVB stand for? - ANSWER Pressure Vacuum Breaker
What is a PVB? - ANSWER A device designed to prevent backsiphonage,
consisting of once independently operating spring-loaded check valve and
an independently operating spring-loaded air-inlet valve
What does RPBP stand for? - ANSWER Reduced Pressure Backflow
Preventer
What does RPZBP stand for? - ANSWER Reduced Pressure Zone
Backflow Preventer
What is an RP? - ANSWER A mechanical device consisting of two
independently operating, spring-loaded check valves with a reduced
pressure zone between the check valves
Containment - ANSWER Protection on the service line - protects the
potable water supply and not the customer
