BACKFLOW MULTIPLE CHOICE TEST
#1 CORRECT 100%
Which type of backflow preventer is most reliable - ANSWERAir gap
What is the maximum pressure drop a little through a double check now assembly -
ANSWER10 psi
To break the back-siphonage action the best approach is - ANSWERIntroduce air into
the system
The maximum height that water can be drawn above a free water surface by back-
siphoange is - ANSWER34 feet
Watermain pressure is drastically reduced to a reduce pressure principal backflow
preventer the relief valve should - ANSWERAlways open to discharge the water in the
zone
In approved Errgott must have at least __________of free air space - ANSWERA
minimum of two pipe diameter of the supply pipe or 6 inches which ever is lesser
What is the most important step before installing backflow prevention assemblies in new
or existing lines - ANSWERPlay planes will be flushed all chips scale and foreign matter
A parallel side-by-side backflow prevention assembly installation as desired in order to -
ANSWERAllow for testing and maintenance
When testing an RP the relief of discharges at the number to shut off valve is closed the
problem is - ANSWERA faulty number one check valve
What shut off's must be closed in order to test a double check valve assembly -
ANSWERUpstream valve
When testing a pressure vacuum breaker the air inlet must open before the gauge falls
to - ANSWER1 psi
And effective cross connection control program requires the complete cooperation of
the following - ANSWERWater purveyor health agency plumbing inspector plumber and
the consumer
When establishing a cross connection control program what information is not essential
on your survey - ANSWERHow much water the customer uses
#1 CORRECT 100%
Which type of backflow preventer is most reliable - ANSWERAir gap
What is the maximum pressure drop a little through a double check now assembly -
ANSWER10 psi
To break the back-siphonage action the best approach is - ANSWERIntroduce air into
the system
The maximum height that water can be drawn above a free water surface by back-
siphoange is - ANSWER34 feet
Watermain pressure is drastically reduced to a reduce pressure principal backflow
preventer the relief valve should - ANSWERAlways open to discharge the water in the
zone
In approved Errgott must have at least __________of free air space - ANSWERA
minimum of two pipe diameter of the supply pipe or 6 inches which ever is lesser
What is the most important step before installing backflow prevention assemblies in new
or existing lines - ANSWERPlay planes will be flushed all chips scale and foreign matter
A parallel side-by-side backflow prevention assembly installation as desired in order to -
ANSWERAllow for testing and maintenance
When testing an RP the relief of discharges at the number to shut off valve is closed the
problem is - ANSWERA faulty number one check valve
What shut off's must be closed in order to test a double check valve assembly -
ANSWERUpstream valve
When testing a pressure vacuum breaker the air inlet must open before the gauge falls
to - ANSWER1 psi
And effective cross connection control program requires the complete cooperation of
the following - ANSWERWater purveyor health agency plumbing inspector plumber and
the consumer
When establishing a cross connection control program what information is not essential
on your survey - ANSWERHow much water the customer uses
