BOILER OPERATOR QUESTION AND ANSWERS 2025

BOILER OPERATOR QUESTION AND ANSWERS
2025/2026

WhatCisCtheCfirstCthingCaCboilerCoperatorCmustCdoCwhenCtakingCoverCaCshift?C-CCORRECTCANSWER-
ReportCtoCworkC10CtoC15CminutesCearly.CCheckCtheCwaterClevelConCallCtheCboilersConCtheClineCbyCblo
wingCdownCtheCgaugeCglass,CwaterCcolumn,CandClowCwaterCfuelCcutoff.

WhatCareCdifferentCwaysCofCgettingCwaterCintoCaCboiler?C-CCORRECTCANSWER-
areCtheCvacuumCpump,CfeedwaterCpump,CautomaticCcityCwaterCmakeupCfeeder,CandChand-
operatedCcityCwaterCmakeupCvalve.

WhatCisCtheCfunctionCofCaCpressureCcontrol?C-CCORRECTCANSWER-
TheCpressureCcontrolCisCsensitiveCtoCpressureCandCcontrolsCtheCboilerCoperatingCrange.CItCstartsCan
dCstopsCtheCburnerConCsteamCpressureCdemand.

HowCareCsafetyCvalvesCtested?C-CCORRECTCANSWER-testedCbyChandCorCbyCpressure.

HowCoftenCshouldCsafetyCvalvesCbeCtested?C-CCORRECTCANSWER-
2.ClowCpressureCboilersCshouldCbeCtestedCbyChandConceCeveryC30CdaysCtheCboilerCisCinCoperation.CT
heCASMECcodeCalsoCrecommendsCtheCtestingCofCsafetyCvalvesCunderCpressureConceCaCyear,Cprefera
blyCbeforeCtheCstartCofCtheCheatingCseason.CInCadditionCtoCtheCASMECcode,CsafetyCvalvesCshouldCbeC
testedCaccordingCtoCrecommendationsCofCtheClocalCboilerCinspector.

6.WhatCisCtheCfunctionCofCaClowCwaterCfuelCcutoff?C-CCORRECTCANSWER-
toCshutCtheCburnerCoffCtoCprotectCtheCboilerCheatingCsurfaceCfromCbecomingCoverheatedCdueCtoClo
wCwaterCinCtheCboiler.

HowCisCaClowCwaterCfuelCcutoffCtested?C-CCORRECTCANSWER-
TheCtwoCmethodsCofCtestingCaClowCwaterCfuelCcutoffCareCbyChandCorCbyCanCevaporationCtest.

WhenCshouldCaCsafetyCvalveCpopConCaClowCpressureCsteamCboiler?C-CCORRECTCANSWER-
ACsafetyCvalveCmustCpopC(open)CwheneverCpressureCexceedsCtheCsafetyCvalveCsettingCtoCpreventCth
eCboilerCfromCexceedingCitsCMAWP.

whatCpressureCshouldCaCsafetyCvalveCpopConCaClowCpressureCsteamCboiler?C-CCORRECTCANSWER-
TheCsafetyCvalvesConClowCpressureCsteamCboilersCareCsetCtoCpopCopenCatC15Cpsi

whatCdoesC

, "purgingCtheCfurnace''CmeanC?C-CCORRECTCANSWER-
whenCtheCburnerCfanCblowsCairCintoCtheCfurnaceCtoCremoveCanyCmixtureCofCgasesCorCfumesCofCaCco
mbustibleCnatureCthatCmightCcauseCaCfurnaceCexplosion

WhatCisCtheCmostCimportantCvalveConCaCboiler?C-CCORRECTCANSWER-safetyCvalve

HowCoftenCshouldCaCsteamCboilerChaveCaCbottomCblowCdown?C-CCORRECTCANSWER-
wheneverCtestsCofCtheCboilerCwaterCindicateChighCchemicalCcon-
CcentrationCorChighCtotalCdissolvedCsolids



HowCisCaCflameCscannerCtested?C-CCORRECTCANSWER-
OneCmethodCisCtoCremoveCtheCscannerCfromCitsCsightingCtubeCandCcoverCitCwithCyourChand,CwhichC
shouldCshutCoffCtheCburner.CTheCsecondCmethodCisCtoCsecureCtheCfuelCgoingCtoCtheCburnerCtoCsimul
ateCaCfuelCfailure,CwhichCshouldCcauseCtheCscannerCtoCshutCtheCburnerCoffConCsafetyClockout.

WhatCmethodsCcanCbeCusedCtoCdetermineCtheCwaterClevelCinCaCboiler?C-CCORRECTCANSWER-
blowCdownCtheCgaugeCglassCandCwatchCtheCactionCofCtheCwaterCleavingCandCreturningCtoCtheCglass.
CTheCsecondCmethodCisCtoCuseCtheCthreeCtryCcocksCandCobserveCwhatCcomesCoutCofCtheCtopCtryCcoc


k,CmiddleCtryCcock,CandCbottomCtryCcockCwhenCtheyCareCopened.CWithCanCNOWL,CtheCtopCtryCcockC
shouldCdischargeCsteam,CtheCmiddleCtryCcockCshouldCdischargeCaCmixtureCofCwaterCandCsteam,Cand
CtheCbottomCtryCcockCshouldCdischargeCwater.



WhatCisCtheCmainCcauseCofCsmoke?C-CCORRECTCANSWER-
smokeCcouldCbeCcausedCbyCcoldCfuelCoil,CpoorCatomization,CinsufficientCprimaryCandCsecondaryCair,
CaCdirtyCburner,CorCfuelCoilCimpingingConCtheCbrickwork.



.WhatCareCtheCdifferentCtypesCofCdraftCusedCinCboilers?C-CCORRECTCANSWER-
naturalCdraftCandCmechanicalCdraft.CMechanicalCdraftCcanCbeCfurtherCclas-
CsifiedCasCforcedCdraft,CinducedCdraft,CorCcombination CforcedCandCinducedCdraft.



WhatCisCtheCfunctionCofCaCcheckCvalveConCaCfeedwaterCline?C-CCORRECTCANSWER-
preventsCwaterCfromCleavingCtheCboilerCwhenCtheCvacuumCpumpCorCboilerCfeedwaterCpumpCstops.

WhatCisCtheCfunctionCofCaCstopCvalveConCaCfeedwaterCline?C-CCORRECTCANSWER-
TheCstopCvalveCisCrequiredCinCtheCeventCtheCcheckCvalveCmalfunctionsC(sticksCopenCorCclosed).CTheC
stopCvalveCcouldCthenCbeCsecuredC(closed)CandCtheCcheck

WhatCactionsCwouldCbeCrequiredCifCaCsafetyCvalveCwasCpoppingCandCtheCsteamCpressureCindicatedC
30CpsiConCtheCboiler?C-CCORRECTCANSWER-
(1)CSecureCtheCburner.C(2)CAllowCsteamCpressureCtoCdropCtoCapproximatelyC15Cpsi.C(3)CUseCtheCsafe
tyCvalveCtestCleverCtoCtestCtheCsafetyCvalve(s)CbyChand.C(4)CIfCtheCsafetyCvalve(s)CpopCopenCandCreset
CatCtheCproperCblow-


Cback,CraiseCtheCsteamCpressureCtoCseeCifCtheCsafetyCvalve(s)CpoppedCbyCpressure.C(5)CIfCtheCsafetyC