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Backflow Prevention Final QUESTIONS AND CORRECT ANSWERS GRADED A+ 2024/2025
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Backflow Prevention Final QUESTIONS AND CORRECT ANSWERS GRADED A+ 2024/2025
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Backflow Prevention Final1. Backflow is described as:
a) the stress within the distribution piping of the potable water supply
b) the unwanted reversal of water, different beverages, gases or materials in the distribution
pipes of the potable water deliver
c) excessive pressure in the pipes of the water person
d) extra strain thru a pressure regulator - ANSb) the unwanted reversal of water, other
liquids, gases or substances within the distribution pipes of the potable water supply
2. Primary obligation for move connection manipulate is vested in
a) the water purveyor
b) the water web site manager
c) the fitness department
d) the State Health department - ANSa) the water purveyor
three. A reduced pressure principle backflow prevention assembly is made out of:
a) independently working air inlet valves with a hydraulically operating robotically
independent differential relief valve
b) check valves, two close off valves and an air comfort valve
c) independently performing accredited test valves, a hydraulically operated differential
pressure remedy valve, with 4 accurately located resilient seated take a look at cocks and
two resilient seated shut off valves
d) two independently operated accredited take a look at valves, mechanically operated air
relief valve, 4 resilient seated take a look at cocks among resilient seated shut off valves -
ANSc) independently acting permitted test valves, a hydraulically operated differential strain
alleviation valve, with 4 correctly located resilient seated check cocks and two resilient
seated shut off valves
4. A nearby ordinance setting up a pass connection control software must require that:
a) the belongings owner check the assembly periodically
b) a licensed tester take a look at the assembly at least once every 12 months and report the
check outcomes to the water purveyor it a well timed way
c) the water purveyor will installation the important go connection manage meeting
d) pressure vacuum breaker can be installed at all provider connections - ANSb) a licensed
tester take a look at the assembly as a minimum as soon as every 365 days and report the
take a look at consequences to the water purveyor it a timely manner
five. The definition of an authorized air gap used for backflow prevention shall be:
a) be geared up with a splash guard and a receiving funnel
b) be now not less than one inch from the facet wall of the receiving vessel
c) be a vertical measurement of as a minimum two times the diameter of the supply pipe but
not much less than one inch above the receiving vessel
,d) be much less that one inch above the flood rim of the receiving vessel - ANSc) be a
vertical measurement of as a minimum two times the diameter of the deliver pipe but now
not much less than one inch above the receiving vessel
6. The correct set up of a discounted pressure precept backflow prevention assembly is:
a) it would not matter in which the meeting is placed
b) in a pit behind the water meter
c) in a vented vault under the floodplain
d) in an above grade, protected and on hand site - ANSd) in an above grade, covered and
reachable web site
7. If water is constantly flowing from the comfort valve port of a discounted strain precept
backflow prevention assembly the tester can also document:
a) the relaxation valve is stuck closed
b) the primary take a look at can be fouled, or the differential stress remedy valve might also
have malfunctioned, or the second one test is fouled with backpressure at the assembly
c) the distribution line is difficulty to strain surges
d) the variety two take a look at valve has failed - ANSb) the primary take a look at may be
fouled, or the differential strain comfort valve may additionally have malfunctioned, or the
second one test is fouled with backpressure at the assembly
8. Backpressure will cause backflow:
a) via an unprotected over the rim feed to an open make-up water tank
b) thru an unprotected over the rim gravity feed line to an open wash tank
c) thru an unprotected feed to a closed makeup water tank
d) via an unprotected feed to a cattle watering trough - ANSc) via an unprotected feed to a
closed makeup water tank
9. In checking out a reduced strain principle backflow prevention meeting:
a) the comfort valve should be examined first
b) the plain drop across the first test valve should be examined first
c) the second take a look at ought to be tested first
d) the go with the flow charge have to be tested first - ANSa) the comfort valve have to be
tested first
10. A water purveyor or public fitness agency may additionally require more frequent
checking out of a backflow prevention meeting than the maximum time allowed among
checking out. What is the maximum legal period of time approved between assessments:
a) six months
b) eighteen months
c) twelve weeks
d) twelve months - ANSd) three hundred and sixty five days
eleven. Which of the following styles of move connections are considered to be unlawful?
A) a by way of-bypass hose with a shut off valve mounted around a discounted stress
principle backflow prevention meeting
b) a supply line to a boiler from a home provider ready with a discounted pressure principle
backflow prevention meeting
, c) a provider to a single own family house
d) an air gapped service to a high upward push constructing - ANSa) a by way of-bypass
hose with a shut off valve hooked up around a discounted stress precept backflow
prevention assembly
12. Backsiphonage because of an aspirator effect maybe because of:
a) a surprising increase of the water deliver
b) excessive pace float of water through a tee in a piping device
c) water from a high pressure pump in opposition to the number two take a look at valve of
an accepted double take a look at valve assembly
d) a hose prepared with an anti-siphon valve on the hose bib being dropped into an open
tank - ANSb) excessive velocity go with the flow of water through a tee in a piping gadget
thirteen. When established correctly stress vacuum breakers will be:
a) 12" above the very best factor of piping and utilization
b) don't have any shut off valves downstream
c) don't have any backpressure on the meeting
d) a and b above
e) a and c above - ANSe) a and c above
(a) 12" above the very best factor of piping and usage
(c) haven't any backpressure at the meeting
14. Which of the subsequent is the backflow protection observed on a kitchen tap in a
residential installation?
A) duplex check valve
b) air gap
c) stress decreasing valve
d) broken surroundings valve - ANSb) air gap
15. In a super vacuum water may be raised to:
a) 33.9 feet
b) 14.7 toes
c) 27.75 feet
d) .433 feet - ANSa) 33.9 toes
sixteen. Backflow from a low inlet to an open plating tank containing a poisonous solution is
well averted by the installation of:
a) a well set up authorised stress type vacuum breaker
b) a well established approved reduced stress principle backflow prevention meeting
c) a nicely mounted atmospheric vacuum breaker
d) anybody of the above - ANSd) someone of the above
17. Which of the subsequent backflow prevention gadgets can not be tested with a
differential pressure gauge?
A) reduced strain principle backflow prevention assembly
b) double check valve meeting
c) atmospheric vacuum breaker
d) double take a look at detector meeting - ANSc) atmospheric vacuum breaker
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