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Certified Pool Operator Handbook Practice Test – 2025/2026 (Correct Answers), Exams of Nursing

Florida International University (FIU)Nursing

Certified Pool Operator Handbook Practice Test – 2025 (Correct Answers) This document features a practice test based on the 2025 Certified Pool Operator (CPO) Handbook, complete with correct answers. It addresses key areas such as water chemistry, pool calculations, safety procedures, equipment operations, and updated health code standards. Ideal for students and professionals preparing for the national CPO certification exam using the latest curriculum.

Typology: Exams

2024/2025

Available from 06/15/2025

Nurseexcel
Nurseexcel 🇺🇸

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Certified Pool Operator Handbook Practice Test – 2025
(Correct Answers)
1. 1.tYoutoperatetat120,000-
gallontpool,tandtupontperformingtyourthourlytchemicaltteststyoutobservetthetfollowingtread
ings:tTotaltAvailabletChlorinetreadingtist1.6tfreetavailabletchlorinetreadingtist1.5tpHtist7.4tYou
rtsupervisingtlifeguardthastjusttinformedtyoutthattyouthavethadtatfecaltincidenttoccur;tatsoli
dtstoolthastbeentdischargedtintotthetpool.tAccordingttotthetCenterstfortDiseasetControl,tastt
hetCPO,tyoutshouldtdotthetfollowing::tcleartthetpooltandtraisetthetfreetchlorinettot2tppm
2. 2.tAssumingtthattyourtlocalthealthtdepartmenttrequirestyouttotraisetthetfreetchlorinettot5tpp
m,thowtmuchtsodiumthypochloritetwouldtbetneededttotraisetthetfreetchlorinetintthetpooltintq
uestiont#1ttotthattlevel?:t3.5tgallons
3. 3.tYoutaretthetCPOtfortantindoorthealthtclubtpool.tThetfacilitytmanagertinformstyoutthattheti
streceivingtcomplaintstabouttatstrongtchlorinetodortintthetpooltarea,tandtseveraltmemberstha
vetcomplainedtofteyetirritation.tThetmosttlikelytcausetoftthesetcomplaintstis::thightlevelstoftc
hloraminestintthetpool
4. 4.tTotdeterminetthetleveltoftchloraminestintthetwater,tyoutshouldtdotwhichtoftthetfollowing
?:ttesttforttotaltchlorinetandtfreetchlorine,tthentsubtracttthetfreetchlorinetnumbertfromtthettotalt
chlorine
5. 5.tYoutoperatetat45,000tgallontindoortpool,tandtupontdoingtyourthourlytchemicaltteststyo
utobservetthetfollowingtreadings:Totaltavailabletchlorinetis
2.2tFreetavailabletchlorinetist1.4tandtpHtist7.6tWhattistthetleveltoftchloraminestintthistpool?:t0.8
6. 7.tYoutaretthetoperatortoftat330,000tgallontoutdoortpool.tYourtlocalthealthtdepartmenttreq
uirestyouttotperformtatwatertbalancetcalculationtoncetmonthly.tUpontperformingtthetwatertte
ststnecessaryttotperformtthistcalculation,tyoutobservetthetfollowingtreadingstintyourtpool:tT
otaltalkalinitytist50tppmtpHtis
7.2tCalciumtHardnesstist150tppmtTemperaturetist76tdegreestFtTotaltDissolvedtSolidstist500tpp
mtUsingtthesetreadings,twhattistthetSaturationtIndextfortthistpool?:t-0.8
7. 8.tTotadjusttthettestedtTotaltAlkalinitytintthetpooltintquestiont#7ttotantaccept-
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1 t/t

Certified Pool Operator Handbook Practice Test – 2025

(Correct Answers)

  1. 1.tYoutoperatetat120,000- gallontpool,tandtupontperformingtyourthourlytchemicaltteststyoutobservetthetfollowingtread ings:tTotaltAvailabletChlorinetreadingtist1.6tfreetavailabletchlorinetreadingtist1.5tpHtist7.4tYou rtsupervisingtlifeguardthastjusttinformedtyoutthattyouthavethadtatfecaltincidenttoccur;tatsoli dtstoolthastbeentdischargedtintotthetpool.tAccordingttotthetCenterstfortDiseasetControl,tastt hetCPO,tyoutshouldtdotthetfollowing::tcleartthetpooltandtraisetthetfreetchlorinettot 2 tppm
  2. 2.tAssumingtthattyourtlocalthealthtdepartmenttrequirestyouttotraisetthetfreetchlorinettot 5 tpp m,thowtmuchtsodiumthypochloritetwouldtbetneededttotraisetthetfreetchlorinetintthetpooltintq uestiont#1ttotthattlevel?:t3.5tgallons
  3. 3.tYoutaretthetCPOtfortantindoorthealthtclubtpool.tThetfacilitytmanagertinformstyoutthattheti streceivingtcomplaintstabouttatstrongtchlorinetodortintthetpooltarea,tandtseveraltmemberstha vetcomplainedtofteyetirritation.tThetmosttlikelytcausetoftthesetcomplaintstis::thightlevelstoftc hloraminestintthetpool
  4. 4.tTotdeterminetthetleveltoftchloraminestintthetwater,tyoutshouldtdotwhichtoftthetfollowing ?:ttesttforttotaltchlorinetandtfreetchlorine,tthentsubtracttthetfreetchlorinetnumbertfromtthettotalt chlorine
  5. 5.tYoutoperatetat45,000tgallontindoortpool,tandtupontdoingtyourthourlytchemicaltteststyo utobservetthetfollowingtreadings:Totaltavailabletchlorinetis 2.2tFreetavailabletchlorinetist1.4tandtpHtist7.6tWhattistthetleveltoftchloraminestintthistpool?:t0.
  6. 7.tYoutaretthetoperatortoftat330,000tgallontoutdoortpool.tYourtlocalthealthtdepartmenttreq uirestyouttotperformtatwatertbalancetcalculationtoncetmonthly.tUpontperformingtthetwatertte ststnecessaryttotperformtthistcalculation,tyoutobservetthetfollowingtreadingstintyourtpool:tT otaltalkalinitytist 50 tppmtpHtis 7.2tCalciumtHardnesstist 150 tppmtTemperaturetist 76 tdegreestFtTotaltDissolvedtSolidstist 500 tpp mtUsingtthesetreadings,twhattistthetSaturationtIndextfortthistpool?:t-0.
  7. 8.tTotadjusttthettestedtTotaltAlkalinitytintthetpooltintquestiont#7ttotantaccept-

2 t/t tabletlevel,twhichtchemicaltwouldtbetmosttappropriate?:tSodiumtBicarbonate

  1. 9.tTotadjusttthettestedtpHtintthetpooltintquestiont#7ttotantacceptabletlevel,twhichtchemica ltwouldtbetmosttappropriate?:tSodiumtCarbonate
  2. 10.tYoutaretthetCPOtfortat28,000tgallonthoteltpool.tYoutperformtatwatertbalancetchemicaltt est,tandttotyourtsurprise,tthetCalciumtHardnesstistonlyt 100 tppm.tHowtmuchtcalciumtchloridet (77%)twouldtbetrequiredttotincreasetthisttot 400 tppm?":t100.8tlbs.
  3. 11.tYoutaretthetCPOtfortat 100 tfoottlong,t 50 tfoottwidetcountrytclubtpool.tThetaveragetdepthtoft thistpooltist 7 tfeet.tYoutreturnttotthetpooltontMondaytmorning,

4 t/t

  1. 26.tPoolstusingtchlorinetgastastatdisinfectanttproducethydrochlorictacid,twhichtcantbetn eutralizedtwith::tcaustictsodatortsodatash
  2. 27.tWhentbalancingtswimmingtpooltwater,tthetfollowingtshouldtbetadjustedtfirst::ttotaltalk alinity
  3. 28.tAtspatwithtwaterttestedtastpHt7.2,ttemperaturet103,tcalciumthardnesst600,ttotaltalka linityt120,tandttdstoft1,500twilltbe::tscaletforming

5 t/t

  1. 29.tWhentperformingtatwaterttest,tsampletwatertshouldtbetcollected::t 18 tinchestbelowtt hetsurface,tawaytfromtreturntline
  2. 30.tSwimmingtpooltcirculationtsystemstshouldtbetadjustedttotremove::t- 75%tfromtthetsurface
  3. 31.tVacuumingtoftthetpooltbottomtshouldtbetdone::taftertforeigntmatterthastsettled
  4. 32.tYoutaretatservicettechtandthavetgottentatcontractttotmaintaintatsmalltmoteltpool.tUpo ntexaminingtthetoperationaltrecords,tyoutfindtthattthetnumbertoftgallonstintthetpooltistnottlisted tintthetrecords.Youtvisittthetpooltandtobservetthattittistatfairlytrectangulartconcretetpool,twithtt hetfollowingtdimensions:tlengtht=t 40 tfeet;twidtht=t 20 tfeet.tThetpooltbottomtslopetistconstantt fromtthetshallowtend,twhichtist 3 tfeettdeep,ttotthetdeeptend,twhichtist 8 tfeettdeep.tWhattistthett otaltnumbertoftgallonstoftwatertintthistpool?:t33,000tgallons
  5. 32.tb.)Youtaretatservicettechtandthavetgottentatcontractttotmaintaintatsmalltmoteltpool.tUp ontexaminingtthetoperationaltrecords,tyoutfindtthattthetnumbertoftgallonstintthetpooltistnottliste dtintthetrecords.Youtvisittthetpooltandtobservetthattittistatfairlytrectangulartconcretetpool,twitht thetfollowingtdimensions:tlengtht=t 40 tfeet;twidtht=t 20 tfeet.tThetpooltbottomtslopetistconstan ttfromtthetshallowtend,twhichtist 3 tfeettdeep,ttotthetdeeptend,twhichtist 8 tfeettdeep.B).tTotachie vetat 6 thourtTORtintthistpool,twhattflowtratetwouldtbetneeded?:t 92 tGPM
  6. 32.tc.)tYoutaretatservicettechtandthavetgottentatcontractttotmaintaintatsmalltmoteltpool.tUp ontexaminingtthetoperationaltrecords,tyoutfindtthattthetnumbertoftgallonstintthetpooltistnottliste dtintthetrecords.Youtvisittthetpooltandtobservetthattittistatfairlytrectangulartconcretetpool,twitht thetfollowingtdimensions:tlengtht=t 40 tfeet;twidtht=t 20 tfeet.tThetpooltbottomtslopetistconstan ttfromtthetshallowtend,twhichtist 3 tfeettdeep,ttotthetdeeptend,twhichtist 8 tfeettdeep.C).tYoutnotice tatcleartgreenishttintttotthetwater.tWhattcouldtbetthetproblem?:tpresencetoftcopper
  7. "33.tYoutaretthetaquaticstmanagertattatverytbusytlocaltgymtthattistopent 24 thourstpertday,t 7 t daystpertweek.tThistgymthastat1,850tgallontspa.tThistspatistintalmosttconstanttusetwithtaboutt 100 tbatherstpertdaytusingtthetspat(on:
  8. average).tYoutbeginttotgettcomplaintstfromtthetbatherstthatttheirteyestaretburningtandtth eirtskintitchestaftertsoaking.":t 6 tdays
  9. 34.tWhentperformingtatcolortmatchingtwaterttest,twhentusingtthetcompara- ttor,tyoutshould::tholdtthetsampletupttotthethorizontoppositetthetsuntortatdaylighttilluminator

7 t/t

  1. 36.tAccordingttotthetCertifiedtPoolt- tSpatOperatortHandbook,twhichtoftthetfollowingtshouldtresulttintthetimmediatetclosuretoftatp ooltortspa?:tphtleveltist8.
  2. 37.tOnetcubictfoottoftwatertcontainstgallons.:t7.
  3. 38.tOnetcubictfoottoftwatertweighstpounds.:t62.
  4. 39.tOnetgallontoftwatertweighstpounds.:t8.
  5. 41.tWhatteffecttdoestgastchlorinethavetontpHtintwater?:tlowers
  6. 46.tWhattistthetidealtrangetforttotaltalkalinity?:t 80 ttot 120 tppm
  7. 47.tThetamounttoftunfilteredtwatertistreducedttotaftertfourtturnovers.:t2%
  8. 48.tWhattistconsideredtthetnecessarytbackwashtratettotachievetpropertagitationtwhe ntbackwashingtsandtfilters?:t 15 tgpm/sf
  9. 60.tAccordingttotthetCertifiedtPoolt- tSpatOperatortHandbook,ttotprovidetpropertbuildingtprotectiontandtcomfortttotuserstthethum iditytlevelstfortindoortpoolstandtspastshouldtbetmaintainedtbetween:t 40 ttot60%
  10. 61.tWhattistthetprocesstoftreplacingtusedtdiatomaceoustearthtpowdertwithtfreshtpowdert called?:tpre.coating
  11. 66.tAccordingttotthetCertifiedtPoolt-tSpatOperatortHandbook,tthetaccept- tabletpHtreadingtis::t 7 t 2 ttot 7 t 8
  12. 67.tWhentdeterminingtthetdegreetoftsaturationtandtpooltwatertthetconstantt(12.1)tinclude statfactortfortTotaltDissolvedtSolidst(TDS),tassumingtatvaluetoftlesstthant1,000tppmtTDS.tWhe ntthetTDStistfoundttotbethighert(1,000- 2,000tppm)tatvaluetoftshouldtbetusedtfortthetconstant.":t12.
  13. 69.tWatertwithtatpHtoftlesstthant7.0tistsaidttotbe::tacidic
  14. 70.tAccordingttotthetCertifiedtPoolt- tSpatOperatortHandbook,tthetidealtleveltforttotaltwatertalkalinitytistppm:t 80 - 120
  15. 71.tSpastandthotttubstrequiretathighertleveltoftchlorinetthantintswimmingtpools.tThetfreet availabletchlorinetconcentrationtshouldtbetmaintainedtattppmtwiththourlytcheckstduringthe avytuse.:t 3 t 0 - 5.
  16. 72.tAccordingttotthetCertifiedtPoolt- tSpatOperatortHandbook,tfiltrationtandtrecirculationtpumpstshouldtoperatet

8 t/t hourstcontinuouslytfortpublictspastandttherapytpools.:t 24

  1. 78.tThetadditiontoftTrichlortTablesttotatswimmingtpoolthastwhatteffecttoftthetpHtlevel?:tl owerstpH
  2. 79.tHeattlossttotthetgroundtfromtatpooltthroughtitstsides,tbottom,tpipestandtfilterstistca lledt.:tconduction
  3. 80.tWatertclaritytistmeasuredtintunitstoft.:tturbidity
  4. 81.tAtvalvethastatverticaltdisctortwedgetattachedttotatlongtthreadedtstemtthattwhentrotat edteithertsealstortunblockstthetflowtoftwater.:tgate

10 t/t etistt t ppmtandtmanythealthtcodestsettthetmaximumtFCtattppm.:t1,t 5

  1. 105.tWithtantincidenttoftdiarrhealtdischargetintatpool,tthetfreetavailabletchlorinetshou ldtbetraisedttot ppm.:t 20
  2. 106.tChlorinetaddedtaftertthetbreakpointtistreachedtwilltexisttast.:tfreetchlorine

11 t/t

  1. 107.tSodiumthypochloritetintitstcommercialtformtcontainstpercenttavail- tabletchlorine.:t 10 - 12
  2. 108.tCalciumthypochloritetcontainstpercenttavailabletchlorinetbytweight.- :t 65
  3. 109.tBrominetistsimilartintmanytrespectsttotchlorine,thowever,tbrominetcannottbetus edtfort.:tstabilization
  4. 110.tThetsolidtchlorinetcompoundtwhichtistusedtwhentatslowtreleasetoftchlorinetovertti metistdesiredtistcalled::ttrichlor
  5. 111.tPropertpHtcontroltoftprovidestbettertchlorinetefficiency.:t7.2-7.
  6. 113.tIttistessentialttotmaintainttotaltalkalinitytattppmtintplastertpools.:t- 80 - 120
  7. 114.tTotcontroltscaling,tpooltwatertthattexceedstppmthardnesstshouldtbetdilutedtortrepl acedtwithtwatertoftsubstantiallytlowerthardness.:t 800 - 1000
  8. 115.tIntdeterminingtcosttfortheating,tittistbestttotsizetthetheaterttotthetnumbertoftgall onstoftwatertintthetspatandtintthetspatandttotthetdesiredttemperature.tBTUstwilltheatt 1 tg allontoftwatert 1 tdegreetF.:t8.
  9. 116.tAt istusedttotradiatetthethighttemperaturetoftthetwatertandtcooltittenoughttotallowtthetremain dertoftthetcirculationtpipingttotthetPVC.:tHeattsink