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Operator in Training: Water Distribution Q&A, Exams of Water and Wastewater Engineering

Harvard UniversityWater and Wastewater Engineering

Water distribution operator in training (OIT) exam prep. Covers disinfection, regulations, pH, turbidity, backflow, pumps, hydrants, and confined space safety. water distribution, operator in training, OIT exam, drinking water, disinfection, backflow prevention, hydrants, water treatment

Typology: Exams

2025/2026

Available from 04/02/2026

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Operator in Training - Water Distribution Exam
Questions with 100% Correct Answers | Verified |
Latest Update
ImportanceTofTprovidingTsecondaryTdisinfectionT-TCorrectTAnswer-
ToTmaintainTaTpersistantTdisinfectantTresidualTthroughoutTtheTdistributionTsy
stemTtoTprotectTwaterTfromTmicrobiologicakTrecontaimination
WhichTregulationTspecifiesToperatorTtrainingTandTcertificationTrequirementsT-
TCorrectTAnswer-O.Reg.T128/04T-
TCertificationTofTDrinkingTWaterTSystemTOperatorsTandTWaterTQualityTAnaly
sts
WhichTregulationsTaddressesTrequirementsTforTalarmsT-TCorrectTAnswer-
O.TReg.T170/03T-TDrinkingTWaterTsystems
InTcaseTofTadverseTwaterTtestTresults,TwhoTshallTtheToperatorTprovideTimmed
iateTwrittenTandTverbalTnotificationTtoTaccordingTtoTO.Reg.T170/03T-
TCorrectTAnswer-
MedicalTOfficerTofTHealthT(MOH)T,TministryTofTenvironmentTandTclimateTch
ange'sTSpillsTActionTCentreT(SAC)TownerTofTtheTsystem
_______TindicatesTtheTacidityTandTbasicityTofTwater,TonTaTscaleTofT0-14T-
TCorrectTAnswer-pH
concentrationTofTaTsolutionT-TCorrectTAnswer-TheTstrengthTofTaTsolution
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Operator in Training - Water Distribution Exam

Questions with 100% Correct Answers | Verified |

Latest Update

ImportanceTofTprovidingTsecondaryTdisinfectionT-TCorrectTAnswer- ToTmaintainTaTpersistantTdisinfectantTresidualTthroughoutTtheTdistributionTsy stemTtoTprotectTwaterTfromTmicrobiologicakTrecontaimination

WhichTregulationTspecifiesToperatorTtrainingTandTcertificationTrequirementsT- TCorrectTAnswer-O.Reg.T128/04T- TCertificationTofTDrinkingTWaterTSystemTOperatorsTandTWaterTQualityTAnaly sts

WhichTregulationsTaddressesTrequirementsTforTalarmsT-TCorrectTAnswer- O.TReg.T170/03T-TDrinkingTWaterTsystems

InTcaseTofTadverseTwaterTtestTresults,TwhoTshallTtheToperatorTprovideTimmed iateTwrittenTandTverbalTnotificationTtoTaccordingTtoTO.Reg.T170/03T- TCorrectTAnswer- MedicalTOfficerTofTHealthT(MOH)T,TministryTofTenvironmentTandTclimateTch ange'sTSpillsTActionTCentreT(SAC)TownerTofTtheTsystem

_______TindicatesTtheTacidityTandTbasicityTofTwater,TonTaTscaleTofT0-14T- TCorrectTAnswer-pH

concentrationTofTaTsolutionT-TCorrectTAnswer-TheTstrengthTofTaTsolution

TheTDevelopmentTorTformationTofTcorrosionTproductsT(rust)TonTtheTinsideTof TanTironTpipeTisTcalled...T-TCorrectTAnswer-Tuberculation

WhatTcanTcauseTcolourTinTsourceTwaterT-TCorrectTAnswer- IronTandTmanganese

WhatTtypeTofTsourceTwaterTisTmostTlikelyTtoThaveThighTlevelsTofTturbidityTan dTmicrobiologicalTcontaminationT-TCorrectTAnswer-GroundTWater

WhatTdoesTGUIDTstandTfor?T-TCorrectTAnswer- GroundwaterTunderTtheTDirectTInfluenceTofTsurfaceTwater

WhatTorganismTcauseTmajorTwater-BourneTdiseaseToutbreaksT- TCorrectTAnswer-E.TcoliTbacteria

PurposeTofTprimaryTdisinfectionT-TCorrectTAnswer- AchieveTtheTrequiredTlevelTofTremovalTorTinactivationTofTpathogenicTorganis ms

WhatTisTtheTprocessTofTaddingTCorineTtoWaterTuntilTtheTquarantineTtheTman ThasTbeenTsatisfied.TATfurtherTadditionsTofTchlorineTafterTthisTpointTwillTresul tTinTanTincreaseTinTtheTfreeTchlorineTresidual.T-TCorrectTAnswer- BreakpointTchlorination

WhatTisTusedTtoTremoveTlargeTdebrisTfromTrawTwaterTisTjustTlogsTfishTandTot herTunwantedTmaterialsT-TCorrectTAnswer-Screens

PumpsTthatTtransferTsurfaceTwaterTtreatmentTplantTareTknownTasT- TCorrectTAnswer-LowTlifts

WhatTstorageTfacilityTisTusedTforTfireTprotectionTandTtheThelpTmaintainTadeq uateTpressureTthroughoutTtheTentireTsystemT-TCorrectTAnswer- ElevatedTtowers

WhatTcausesTanTimpactTonTtheTwaterTdemandT-TCorrectTAnswer-FireTflow

AT________TisTaTserviceTshutoffTvalveTlocatedTinTtheTserviceTlineTbetweenTth eTwaterTmainTandTbuildingT-TCorrectTAnswer-CurbTStop

WaterThammerTisTcausedTbyT-TCorrectTAnswer- OpeningTandTclosingTaTvalveTtoTquickly

FireThydrantTcapsTareTcommonlyTcolourTcodedTtoT-TCorrectTAnswer- IndicateThydrantTflowTcapacity

AnTexampleTofTmechanicalTcleaningTofTdistributionTpipesTincludesT- TCorrectTAnswer-SwabbingTandTpigging

WhatTisTtheTrecommendedTminimumTwaterTpressureTinTaTdistributionTsyste mTatTanyTtimeTincludingTfireTflowTconditionsT-TCorrectTAnswer- 20 TpsiTorT 138 TkPa

TheTprimaryTreasonTforTtheTuseTofTaTdryTbarrelTfireThydrantTisTtoT- TCorrectTAnswer-PreventTtheThydrantTfromTfreezing

ATsafetyTprecautionTthatTmustTbeTfollowedTworkingTwithTaTlargeTCokeTQuit manTincludesT-TCorrectTAnswer- OnlyTpreformTelectricalTworkTifTyouTareTqualifiedTandTproperlyTtrainedTtoTdo

AThealthThazardTassociatedTwithTconfinedTspacesTincludesT-TCorrectTAnswer- OxygenTdeficiency

AnTairTcompressorTusedTinTtheToperationTofTaTwaterTtreatmentTorTdistributio nTsystemT-TCorrectTAnswer-MustTuseTfoodTgradeTlubricant

StandTbyTpowerTgenerationsTshouldT...T-TCorrectTAnswer- BeTperiodicallyTusedTatTleastTonceTperTmonth

WhatTisTtheTdifferenceTbetweenTlowTliftTandThighliftTpumpsT- TCorrectTAnswer- LowTliftTpumpsTdeliversTwaterTfromTaTnearbyTsupplyTtoTaTtreatmentTfacilityT whileThighTliftTpumpTdeliverTtreatedTwaterTtoTstorageTtanksTinTtheTdistributi onTsystem

AlolaTpumpTdeliversTwaterTfromTaTnearbyTsupplyTtoTaTtreatmentTfacilityTwhil eThighTliftTpumpTdeliverTtreatedTwaterTtoTstorageTtanksTinTtheTdistributionTs ystemT-TCorrectTAnswer-