BACKFLOW TEST QUESTIONS &
SOLUTIONS(RATED A+)
A water supplier shall interrupt water service to a user/customer when - ANSWERA.
Provisions in the cross-connection control ordinance or regulations are not met
Backflow in a water distribution system can be caused by - ANSWERC. Both A and B
backpressure and backsiphonage
An atmospheric vacuum breaker may have a downstream shut-off valve - ANSWERD.
Under no circumstances
The Federal Safe Drinking Water Act places the responsibility for the quality of the
public water supply on which of the following - ANSWERA. Water purveyor
An approved air gap must have - ANSWERD. Both B and C
B.minimum 1" separation
C. Two times the pipe diameter
An unprotected bypass around a reduced pressure principle backflow prevention
assembly - ANSWERD. Never
The main concern of the water purveyor where an auxiliary water supply is utilized or
maintained is to ensure - ANSWERA. That backflow protection is provided at the water
service connection
A pressure vacuum breaker may be installed with a - ANSWERA. Control valve
downstream
Multistory buildings may need a backflow prevention assembly installed - ANSWERD.
All of the above
A: at the service connection
B: on the fire suppression system
C: when the building is ten or more stories high
When toxic chemicals are added to the fire suppression system, which of the following
is required to protect the potable water system - ANSWERC. Reduced pressure
principle backflow prevention assembly
The administrative authority should maintain a record backflow prevention assemblies
installed on the water distribution system - ANSWERD. All of the above
A: to verify that a backflow program is in place
B: to compile performance data on specific locations and assemblies
C: to ensure minimum annual testing of backflow prevention assemblies
, A defensible backflow prevention program will maintain records on which of the
following - ANSWERD. All of the above
A: backflow prevention assemblies within the system
B: complete list of certified backflow assembly testers
C: back flow prevention test reports
In responding to a potential backflow incident, the water purveyor must - ANSWERD.
Implement emergency response plan
The loading of the first and second check valves on reduced pressure principle backflow
prevention assemblies - ANSWERB. Always different
Undersized water service and second check valves on reduces pressure principle back
flow prevention assemblies - ANSWERB. May cause backsiphonage due to aspirator
effect
A perfect vacuum (at sea level) will raise water in a pipe a maximum of - ANSWERC.
33.9 feet
The water supplier may require more frequent testing of backflow prevention
assemblies - ANSWERD. All of the above
A: due to high hazards
B: due to high incidence of field test failures of the assembly
C: due to frequent internal plumbing changes
To properly field test a reduced pressure principle backflow prevention assembly -
ANSWERB. The outlet shut-off valves must be closed
A differential pressure gauge is used to field test - ANSWERD. Bath A and C
A: reduced pressure principle backflow assemblies
C: pressure vacuum breakers
Performance designs require that the pressure relief valve opening point of a reduced
pressure principal backflow assembly must open at or above the minimum of -
ANSWERB. Two (2) psid
When field testing a reduced pressure principle backflow assembly, the number two test
cock should be flushed - ANSWERD. With caution to prevent premature opening of
relief valve
During a field test, the air inlet valve on a pressure vacuum breaker must open -
ANSWERA. At or above 1 psid on a differential gauge
Hose Bibb vacuum breakers should be located - ANSWERB. On hose bibbs as required
by code
SOLUTIONS(RATED A+)
A water supplier shall interrupt water service to a user/customer when - ANSWERA.
Provisions in the cross-connection control ordinance or regulations are not met
Backflow in a water distribution system can be caused by - ANSWERC. Both A and B
backpressure and backsiphonage
An atmospheric vacuum breaker may have a downstream shut-off valve - ANSWERD.
Under no circumstances
The Federal Safe Drinking Water Act places the responsibility for the quality of the
public water supply on which of the following - ANSWERA. Water purveyor
An approved air gap must have - ANSWERD. Both B and C
B.minimum 1" separation
C. Two times the pipe diameter
An unprotected bypass around a reduced pressure principle backflow prevention
assembly - ANSWERD. Never
The main concern of the water purveyor where an auxiliary water supply is utilized or
maintained is to ensure - ANSWERA. That backflow protection is provided at the water
service connection
A pressure vacuum breaker may be installed with a - ANSWERA. Control valve
downstream
Multistory buildings may need a backflow prevention assembly installed - ANSWERD.
All of the above
A: at the service connection
B: on the fire suppression system
C: when the building is ten or more stories high
When toxic chemicals are added to the fire suppression system, which of the following
is required to protect the potable water system - ANSWERC. Reduced pressure
principle backflow prevention assembly
The administrative authority should maintain a record backflow prevention assemblies
installed on the water distribution system - ANSWERD. All of the above
A: to verify that a backflow program is in place
B: to compile performance data on specific locations and assemblies
C: to ensure minimum annual testing of backflow prevention assemblies
, A defensible backflow prevention program will maintain records on which of the
following - ANSWERD. All of the above
A: backflow prevention assemblies within the system
B: complete list of certified backflow assembly testers
C: back flow prevention test reports
In responding to a potential backflow incident, the water purveyor must - ANSWERD.
Implement emergency response plan
The loading of the first and second check valves on reduced pressure principle backflow
prevention assemblies - ANSWERB. Always different
Undersized water service and second check valves on reduces pressure principle back
flow prevention assemblies - ANSWERB. May cause backsiphonage due to aspirator
effect
A perfect vacuum (at sea level) will raise water in a pipe a maximum of - ANSWERC.
33.9 feet
The water supplier may require more frequent testing of backflow prevention
assemblies - ANSWERD. All of the above
A: due to high hazards
B: due to high incidence of field test failures of the assembly
C: due to frequent internal plumbing changes
To properly field test a reduced pressure principle backflow prevention assembly -
ANSWERB. The outlet shut-off valves must be closed
A differential pressure gauge is used to field test - ANSWERD. Bath A and C
A: reduced pressure principle backflow assemblies
C: pressure vacuum breakers
Performance designs require that the pressure relief valve opening point of a reduced
pressure principal backflow assembly must open at or above the minimum of -
ANSWERB. Two (2) psid
When field testing a reduced pressure principle backflow assembly, the number two test
cock should be flushed - ANSWERD. With caution to prevent premature opening of
relief valve
During a field test, the air inlet valve on a pressure vacuum breaker must open -
ANSWERA. At or above 1 psid on a differential gauge
Hose Bibb vacuum breakers should be located - ANSWERB. On hose bibbs as required
by code
