Backflow Prevention Practice Exam With Answers (100 Solved Questions)

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BACKFLOW PREVENTION ASSEMBLY TESTER PRACTICE EXAM QUESTIONS ANDACCURATE ASNWERS//GRADED A+In responding to a backflow incident the water purveyor should(A) Call the mayor(B) Implement the emergency response plan(C) Install a vacuum breaker(D) Develop a good excuse-answer-Implement the emergency response planA mixture of air and gas is considered hazardous when the mixture exceeds what percentage of gthelower explosive limit(A) 0%(B) 3%(C) 7%(D) 10%-answer-10%To exert a pressure of 1.0 psi at base of a water column the column would have to be(A)4.34 high(B) 14.7 high(C) 27.75 high(D) 33.89 high-answer-27.75 highA DC must be tested(A) Upon installation(B) Every 6 month(C) Annually on a health hazard(D) none of the above-answer-Upon installationAn absolute perssure of 25 psiaa (atsea level) is equal to approximately(A) 5 psi

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(B) 10 psi(C) 20 psi(D) 25 psi-answer-10 psiDueing a field test the air inlet on PVB must open at(A) Above 2.0 psid(B) Below 1.0 psid(C) Above 1.0 psid(D) Below 2.0 psid-answer-Above 1.0 psidA differential pressuer gauge is used to field test(A) PVB's(B) Dual Checks(C) AVB's(D) All the above-answer-PVB'sBackflow in a water supply can be caused by(A) Backpressure only(B) A Barometric Loop(C) Backsiphonage only(D) Backpressureand Backsiphonage-answer-Backpressure and BacksiphonageA BPATtester is required to report test information on the proper forms to the(A) Administrative authority(B) Manufacturer's Rep(C) EPA(D) None of the above-answer-Administrative authorityThe relief valve opens when closing #2 shut off valve on a RP What is the most probable cause

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(A) #1 Shutoff valve is open(B) #2 Shut off valve is open(C) #1 check is fouled open(D) Shut offis leaking-answer-#1 check is fouled openWhen field testing the #1 Check of a RP the differential pressurw shouid be(A) Greter than or equal to 5.0 psid(B) 3.0 psid greater than the relief valve opening point(C) 1.0 psid in the directiom of flow(D) Less than 5.0 psid-answer-Greter than or equal to 5.0 psidWhen testing a SVB what is the firsrt test being performed(A) The air inlet opening point(B) The static pressure across the check valve(C) To verify the #2shut off hold tight(D) Tocheck if the SVB hold water-answer-The static pressure across the check valveWhen testing a PVB the air inlet opens upon closing the #1 shut off valve What is the most probablecause(A) Leaking #2 shut off valve(B) Leaking #1 shut off valve(C)Fouied air inlert(D) Fouied check valve-answer-Leaking #2 shut off valveA 2" AVB when used on irrigation systemsterm-15 shall be instilled(A) 6" above all downstream piping(B) 18" above all downstream piping(C) 24" above all downstream piping(D) 27 3/4" above all downstream piping-answer-6" above all downstream piping

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What causes the relief valief valve to close on a RPZ?(A) Reilef valve spring pressure(B) Supply side water pressure(C) Pressure differential between Check #1 and Check#2(D) All the above-answer-Supply side water pressureWhen testing a RP instialled in vauil the relief valve opening point falls to zero What is most probabiecause(A) The relief valve is stuck shut(B) #1 check is fouled(C) the #2 shut off leaksby(D) Installed improperly-answer-Installed improperlyWhen field testing the DC the #1 check static differential pressure is found to be 0.0 psid What is themost probable cause(A) Fouied #2 Check(B) Leaking #2 shut off(C) Fouled #1 check(D)Leaking #1 shut off-answer-Fouled #1 checkThe critical level for checking the air inlet of the PVB is(A) At the air inlet(B) At #1 shut off(C) At #1 test cock(D) At #2 shut off-answer-At the air inletThe physical operation of a Hose Bibb Vacuum Breaker is classified as a type of(A) Dual check valve

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(B) Atmospherlc vacuum breaker(C) Pressure vacuum breaker(D) Doubie check backflow preventer-answer-Atmospherlc vacuum breakerAn oxygen deficient atmosphere has less than what precentage of oxygen(A) 19.50%(B) 10%(C) 21%(D) 24%-answer-19.50The relief valve of a RP discharges in flow and non-flow condition What is the most probable cause(A) Fouied #1 check(B) Fouied #2 check(C) Fouied relief valve(D) Line pressure fiuctuation-answer-Fouied relief valveA PVB may be installed with(A) A pump downstream(B) A water heater downstream(C) A shutoff valve downstream(D) An eievated storage tank downstream-answer-A shutoff valve downstreamThe relief valve of a Reduced Pressure Principle Assmbly remains closed during normal operation due to(A) Supply side pressure(B) The relief valve spring(C) Zone pressure(D) All the above-answer-The relief valve spring

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What would cause a continual flow of water from of water the air inlet of a PVB prior strting the fieldtest(A) #2 shut off leaking by with baclpressure(B) Fouled ckeck valve(C) #1 shull off leakingby(D) Fouled air inlet-answer-Fouled air inletA PVB can be installed in the following conditions(A) Backpressure(B) Backsiphonage(C) B and D(D) Pollutants and Contaminants-answer-B Backsiphonage and D Pollutants and ContaminantsWhen testing the check valve ob a SVB the water will not stop flowing What is the most probabie cause(A) #2 shut off valve leaks by(B) #1 shut off valve leaks by(C) check valve is fouled(D) None of the above-answer-#1 shut off valve leaks byWhich of the following could cause a closed system if installed in the sevice line(A) Hose bibb(B) Backflow Prevention Assembly(C) venturi(D) T & P valve-answer-Backflow Prevention AssemblyThe critical level when testing the SVB is(A) At theair inlet(B) At the #1 shutoff valve(C) At the vent screw

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(D) there is on critical level-answer-At the vent screwDuring the test of the check valve on a Pvb water continues to flow from the #2 test cock What is themost probabie(A) Leaking #1 shut off valve(B) Fouied air inlet(C) Fouied ckeck valve(D) Incorrect test procedure-answer-Leaking #1 shut off valveWhich of the following backflow assmblies are allowable for use against a contaminant when thebackflow could be caused by backpressure(A) Atmospheric vacuum breaker(B) Doubie check valve assembly(C) Pressure vacuum breaker assembly(D) Redued pressure backflow assembly-answer-Redued pressure backflow assemblyWhile testing a backflow device under the influence of direct cross connection it is observed that thehazard preset is a pollutant Which assembly is appropriate for protection(A) AVB , PVB , Air Gap(B) RP , DC , SVB(C) Air Gap , RP , DC(D) Barometric Loop-answer-Air Gap , RP , DCHow many test cocks are required on a RP(A) 1(B) 2(C) 3(D) 4-answer-4What is the primary consideration when deciding whether ro install a DC or a RP

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