BACKFLOW WRITTEN EXAM QUESTIONS
WITH CORRECT ANSWERS
A water supplier may interrupt water service to a (user/ customer)
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when? - CORRECT ANSWER✔✔-provisions in the cross connection
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control ordinance or regulations are not met
|| || || || || ||
Backflow in a public water supply can be caused by? - CORRECT
|| || || || || || || || || || || ||
ANSWER✔✔-backpressure or backsiphonage || ||
An atmospheric vacuum breaker may have a downstream shutoff
|| || || || || || || || ||
valve? - CORRECT ANSWER✔✔-under no circumstances
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The 1996 Federal Safe Drinking Water Act places the primary
|| || || || || || || || || ||
responsibility for the quality of the public water supply on which of
|| || || || || || || || || || || ||
the following? - CORRECT ANSWER✔✔-water purveyor
|| || || || ||
An air gap must have? - CORRECT ANSWER✔✔-two times the pipe
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diameter with a minimum of inch seperation
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,An unprotected by-pass around a reduced pressure principle
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backflow prevention assembly is? - CORRECT ANSWER✔✔-not
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permissible
The major concerns of the water purveyor where an auxiliary water
|| || || || || || || || || || ||
supply is utilized or maintained is to ensure that? - CORRECT
|| || || || || || || || || || ||
ANSWER✔✔-backflow protection is provided at the water service || || || || || || || ||
connection
A pressure vacuum breaker may be installed with a (n)? - CORRECT
|| || || || || || || || || || || ||
ANSWER✔✔-shutoff valve downstream || ||
Two types of cross-connections are? - CORRECT ANSWER✔✔-direct
|| || || || || || || ||
and indirect ||
When non-toxic antifreeze chemicals are added to a fire
|| || || || || || || || ||
suppressions system, which of the following is required to protect
|| || || || || || || || || ||
the potable water supply? - CORRECT ANSWER✔✔-reduced pressure
|| || || || || || ||
principle backflow prevention assembly
|| || || ||
Internal protection refers to? - CORRECT ANSWER✔✔-backflow
|| || || || || || ||
protection at each point of use || || || || ||
, Lye is back siphoned from and open vat, without a cover over the
|| || || || || || || || || || || || ||
top, by a direct cross-connection. This constitutes a? - CORRECT
|| || || || || || || || || ||
ANSWER✔✔-health hazard ||
In responding to a suspected backflow incident, the water purveyor
|| || || || || || || || || ||
should? - CORRECT ANSWER✔✔-implement emergency response
|| || || || || ||
plan
The loading of the first and second check valves in reduced pressure
|| || || || || || || || || || ||
principle backflow prevention assemblies are always? - CORRECT
|| || || || || || || || ||
ANSWER✔✔-different
undersized water service and distribution piping carrying water at
|| || || || || || || || ||
high velocity? - CORRECT ANSWER✔✔-may cause backsiphonage due
|| || || || || || ||
to aspirator effect
|| || ||
a perfect vacuum(at sea level) will raise water in a pipe a maximum
|| || || || || || || || || || || || ||
of? - CORRECT ANSWER✔✔-33.9 ft
|| || || ||
the water supplier may require more frequent field testing of
|| || || || || || || || || ||
backflow prevention assemblies due to? - CORRECT ANSWER✔✔-
|| || || || || || ||
high incidence of field test failures of the assembly
|| || || || || || || ||
WITH CORRECT ANSWERS
A water supplier may interrupt water service to a (user/ customer)
|| || || || || || || || || || ||
when? - CORRECT ANSWER✔✔-provisions in the cross connection
|| || || || || || || ||
control ordinance or regulations are not met
|| || || || || ||
Backflow in a public water supply can be caused by? - CORRECT
|| || || || || || || || || || || ||
ANSWER✔✔-backpressure or backsiphonage || ||
An atmospheric vacuum breaker may have a downstream shutoff
|| || || || || || || || ||
valve? - CORRECT ANSWER✔✔-under no circumstances
|| || || || ||
The 1996 Federal Safe Drinking Water Act places the primary
|| || || || || || || || || ||
responsibility for the quality of the public water supply on which of
|| || || || || || || || || || || ||
the following? - CORRECT ANSWER✔✔-water purveyor
|| || || || ||
An air gap must have? - CORRECT ANSWER✔✔-two times the pipe
|| || || || || || || || || || ||
diameter with a minimum of inch seperation
|| || || || || ||
,An unprotected by-pass around a reduced pressure principle
|| || || || || || || ||
backflow prevention assembly is? - CORRECT ANSWER✔✔-not
|| || || || || || ||
permissible
The major concerns of the water purveyor where an auxiliary water
|| || || || || || || || || || ||
supply is utilized or maintained is to ensure that? - CORRECT
|| || || || || || || || || || ||
ANSWER✔✔-backflow protection is provided at the water service || || || || || || || ||
connection
A pressure vacuum breaker may be installed with a (n)? - CORRECT
|| || || || || || || || || || || ||
ANSWER✔✔-shutoff valve downstream || ||
Two types of cross-connections are? - CORRECT ANSWER✔✔-direct
|| || || || || || || ||
and indirect ||
When non-toxic antifreeze chemicals are added to a fire
|| || || || || || || || ||
suppressions system, which of the following is required to protect
|| || || || || || || || || ||
the potable water supply? - CORRECT ANSWER✔✔-reduced pressure
|| || || || || || ||
principle backflow prevention assembly
|| || || ||
Internal protection refers to? - CORRECT ANSWER✔✔-backflow
|| || || || || || ||
protection at each point of use || || || || ||
, Lye is back siphoned from and open vat, without a cover over the
|| || || || || || || || || || || || ||
top, by a direct cross-connection. This constitutes a? - CORRECT
|| || || || || || || || || ||
ANSWER✔✔-health hazard ||
In responding to a suspected backflow incident, the water purveyor
|| || || || || || || || || ||
should? - CORRECT ANSWER✔✔-implement emergency response
|| || || || || ||
plan
The loading of the first and second check valves in reduced pressure
|| || || || || || || || || || ||
principle backflow prevention assemblies are always? - CORRECT
|| || || || || || || || ||
ANSWER✔✔-different
undersized water service and distribution piping carrying water at
|| || || || || || || || ||
high velocity? - CORRECT ANSWER✔✔-may cause backsiphonage due
|| || || || || || ||
to aspirator effect
|| || ||
a perfect vacuum(at sea level) will raise water in a pipe a maximum
|| || || || || || || || || || || || ||
of? - CORRECT ANSWER✔✔-33.9 ft
|| || || ||
the water supplier may require more frequent field testing of
|| || || || || || || || || ||
backflow prevention assemblies due to? - CORRECT ANSWER✔✔-
|| || || || || || ||
high incidence of field test failures of the assembly
|| || || || || || || ||
