BACKFLOW EXAM QUESTIONS &
ANSWERS(GRADED A+)
Double Check Valve Assembly - ANSWERA testable mechanical device consisting of
two independently operating, spring-loaded check valves, four test cocks, and two full
port shut off valves
the purpose of an ASSE 1018 trap primer is to - ANSWERmaintain a trap seal
a laboratory faucet vacuum breaker must contain - ANSWERtwo independently acting
check valves
ASSE 1060 - ANSWERoutdoor enclosures standard, freeze protective enclosures must
provide protection to a remedies of -30 f
device - ANSWERa backflow prevents generally consisting of a single valve body not
capable of being field tested using a differential gauge
to stop a siphonic actin within a potable water system, we must - ANSWERadmit air into
the system
waterborne diseases - ANSWERtyphoid, cholera and giardiasis
a double check detector assembly installed on a antifreeze loop area requires -
ANSWERreplacement
removal of the relief valve spring on a reduced pressure principle assembly will cause
the assembly to - ANSWERbecome a approved double check valve assembly
when testing the first check valve in the direction of flow on a reduced pressure
assembly using a sight tube the tube must be a minimum of - ANSWER138.75
continuing discharge for a reduced pressure principle assembly during a no flow
condition may be caused by - ANSWERa debris fouling the number one check valve
negligence - ANSWERnot meeting ones responsibility and causing harm
residual pressure - ANSWERthe pressure available at a fixture or water outlet after
allowances are made for pressure
natural or propane fires domestic water heatersbare protected from excess pressure by
the installation of a.. - ANSWERthermal expansion tank
, installation of backflow assemblies results in - ANSWERdecrease in system water
pressure
according to the manufacturers instructions valve levers on a t&p relief valve should be
operated at least - ANSWERevery 12 months
the installation of backflow asswmblies result in - ANSWERvelocity spike
when installaing a thermal expanaion tank, you should always - ANSWERmatch the
tank air pressure to the syatem water pressure
what assembly creates a closed water system - ANSWERprz, double check valve
assembly, pressure reducing valve, dual check valve
relief valves according to manufacture instructions must be inspected - ANSWERevery
three months
temperture and pressure relief valves on domestic water equipment should be sized
based on - ANSWERbtu input, water volume
whats not allowed on a irrigation system - ANSWERdouble check
how do you calculate pressure at the bottom of 60 ft - ANSWER60÷.433
negative gauge pressure - ANSWERhigh usuage
test cock sizes - ANSWER1/4-3/4
a dual check - ANSWERdevice
backsiphon will be what psi - ANSWER0psi
negative pressure will result in - ANSWERhigh usage
more velocity= - ANSWERless pressure
barometric loop - ANSWER35ft high
non-testable - ANSWERdevice
install RP - ANSWER12in above the floor
assymbly - ANSWERare testable
swing connection - ANSWERillegal
ANSWERS(GRADED A+)
Double Check Valve Assembly - ANSWERA testable mechanical device consisting of
two independently operating, spring-loaded check valves, four test cocks, and two full
port shut off valves
the purpose of an ASSE 1018 trap primer is to - ANSWERmaintain a trap seal
a laboratory faucet vacuum breaker must contain - ANSWERtwo independently acting
check valves
ASSE 1060 - ANSWERoutdoor enclosures standard, freeze protective enclosures must
provide protection to a remedies of -30 f
device - ANSWERa backflow prevents generally consisting of a single valve body not
capable of being field tested using a differential gauge
to stop a siphonic actin within a potable water system, we must - ANSWERadmit air into
the system
waterborne diseases - ANSWERtyphoid, cholera and giardiasis
a double check detector assembly installed on a antifreeze loop area requires -
ANSWERreplacement
removal of the relief valve spring on a reduced pressure principle assembly will cause
the assembly to - ANSWERbecome a approved double check valve assembly
when testing the first check valve in the direction of flow on a reduced pressure
assembly using a sight tube the tube must be a minimum of - ANSWER138.75
continuing discharge for a reduced pressure principle assembly during a no flow
condition may be caused by - ANSWERa debris fouling the number one check valve
negligence - ANSWERnot meeting ones responsibility and causing harm
residual pressure - ANSWERthe pressure available at a fixture or water outlet after
allowances are made for pressure
natural or propane fires domestic water heatersbare protected from excess pressure by
the installation of a.. - ANSWERthermal expansion tank
, installation of backflow assemblies results in - ANSWERdecrease in system water
pressure
according to the manufacturers instructions valve levers on a t&p relief valve should be
operated at least - ANSWERevery 12 months
the installation of backflow asswmblies result in - ANSWERvelocity spike
when installaing a thermal expanaion tank, you should always - ANSWERmatch the
tank air pressure to the syatem water pressure
what assembly creates a closed water system - ANSWERprz, double check valve
assembly, pressure reducing valve, dual check valve
relief valves according to manufacture instructions must be inspected - ANSWERevery
three months
temperture and pressure relief valves on domestic water equipment should be sized
based on - ANSWERbtu input, water volume
whats not allowed on a irrigation system - ANSWERdouble check
how do you calculate pressure at the bottom of 60 ft - ANSWER60÷.433
negative gauge pressure - ANSWERhigh usuage
test cock sizes - ANSWER1/4-3/4
a dual check - ANSWERdevice
backsiphon will be what psi - ANSWER0psi
negative pressure will result in - ANSWERhigh usage
more velocity= - ANSWERless pressure
barometric loop - ANSWER35ft high
non-testable - ANSWERdevice
install RP - ANSWER12in above the floor
assymbly - ANSWERare testable
swing connection - ANSWERillegal
