BACKFLOW TEST QUESTIONS AND
ANSWERS
A water supplier shall interrupt water service to a user/customer when - Correct
Answers -A. Provisions in the cross-connection control ordinance or regulations are not
met
Backflow in a water distribution system can be caused by - Correct Answers -C. Both A
and B
backpressure and backsiphonage
An atmospheric vacuum breaker may have a downstream shut-off valve - Correct
Answers -D. 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 - Correct Answers -A. Water purveyor
An approved air gap must have - Correct Answers -D. 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 - Correct Answers -D. Never
The main concern of the water purveyor where an auxiliary water supply is utilized or
maintained is to ensure - Correct Answers -A. That backflow protection is provided at
the water service connection
A pressure vacuum breaker may be installed with a - Correct Answers -A. Control valve
downstream
Multistory buildings may need a backflow prevention assembly installed - Correct
Answers -D. 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 - Correct Answers -C. Reduced pressure
principle backflow prevention assembly
The administrative authority should maintain a record backflow prevention assemblies
installed on the water distribution system - Correct Answers -D. 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 - Correct Answers -D. 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 - Correct
Answers -D. Implement emergency response plan
The loading of the first and second check valves on reduced pressure principle backflow
prevention assemblies - Correct Answers -B. Always different
Undersized water service and second check valves on reduces pressure principle back
flow prevention assemblies - Correct Answers -B. May cause backsiphonage due to
aspirator effect
A perfect vacuum (at sea level) will raise water in a pipe a maximum of - Correct
Answers -C. 33.9 feet
The water supplier may require more frequent testing of backflow prevention
assemblies - Correct Answers -D. 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 -
Correct Answers -B. The outlet shut-off valves must be closed
A differential pressure gauge is used to field test - Correct Answers -D. 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 - Correct
Answers -B. Two (2) psid
ANSWERS
A water supplier shall interrupt water service to a user/customer when - Correct
Answers -A. Provisions in the cross-connection control ordinance or regulations are not
met
Backflow in a water distribution system can be caused by - Correct Answers -C. Both A
and B
backpressure and backsiphonage
An atmospheric vacuum breaker may have a downstream shut-off valve - Correct
Answers -D. 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 - Correct Answers -A. Water purveyor
An approved air gap must have - Correct Answers -D. 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 - Correct Answers -D. Never
The main concern of the water purveyor where an auxiliary water supply is utilized or
maintained is to ensure - Correct Answers -A. That backflow protection is provided at
the water service connection
A pressure vacuum breaker may be installed with a - Correct Answers -A. Control valve
downstream
Multistory buildings may need a backflow prevention assembly installed - Correct
Answers -D. 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 - Correct Answers -C. Reduced pressure
principle backflow prevention assembly
The administrative authority should maintain a record backflow prevention assemblies
installed on the water distribution system - Correct Answers -D. 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 - Correct Answers -D. 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 - Correct
Answers -D. Implement emergency response plan
The loading of the first and second check valves on reduced pressure principle backflow
prevention assemblies - Correct Answers -B. Always different
Undersized water service and second check valves on reduces pressure principle back
flow prevention assemblies - Correct Answers -B. May cause backsiphonage due to
aspirator effect
A perfect vacuum (at sea level) will raise water in a pipe a maximum of - Correct
Answers -C. 33.9 feet
The water supplier may require more frequent testing of backflow prevention
assemblies - Correct Answers -D. 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 -
Correct Answers -B. The outlet shut-off valves must be closed
A differential pressure gauge is used to field test - Correct Answers -D. 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 - Correct
Answers -B. Two (2) psid
