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CWEA COLLECTION SYSTEMS MAINTENANCE,QUESTIONS WITH ALL ANSWERS

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CWEA COLLECTION SYSTEMS MAINTENANCE,QUESTIONS WITH ALL ANSWERS

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CWEA COLLECTION SYSTEMS
MAINTENANCE,QUESTIONS WITH ALL
ANSWERS




WhyVareVgasolineVandVvolatileVsolventsVobjectionableVwhenVpresentVinVaVsewer?V-
VcorrectVanswer-TheyVproduceVanVexplosionVhazard




YouVshouldVneverVattemptVtoVinstall,Vmaintain,VrepairVorVreplaceVelectricalVequipmentVp
anels,Vcontrols,VwiringVorVcircuitsVunlessV-VcorrectVanswer-
YouVknowVwhatVyouVareVdoing,VareVqualifiedVandVareVauthorized

WhatVareVtheVdifferentVareasVofVtrafficVzones?V-VcorrectVanswer-
AdvanceVWarningVArea,VTransitionVArea,VActivityVAreaV(bufferVspaceVandVworkVspace)
,VTerminationVArea.VCouldVbeV4VorV5,VjustifyVyourVanswerVonVtheVtest!

whyVshouldVhydrogenVsulfideVbeVcontrolled?V-VcorrectVanswer-
toVprotectVfromVcorrosionVandVodors

PersonnelVenteringVaVPermitVRequiredVConfinedVSpaceVmustVhaveVtheVfollowingVtraini
ngV-VcorrectVanswer-entryVandVrescue

ToVfindVprotectiveVgearVbeforeVapplicationVofVaVproduct,VyouVshould:V-VcorrectVanswer-
lookVatVtheVMSDS

TheVgasVmostVcommonlyVassociatedVwithVsepticVwastewaterVisV-VcorrectVanswer-
HydrogenVSulfide

, TheVlackVofVanVunpleasantVodorVinVaVmanhole,VliftVstationVorVotherVstructuresVdoesVnotV
alwaysVmeanVthatVdangerousVgasesVareVnotVpresentVbecause:V-VcorrectVanswer-
someVdangerousVgassesVareVodorlessV(forVexample,VcarbonVmonoxide)

WhatVareVtheVfourVconditionsVnecessaryVtoVcreateVanVexplosion?V-VcorrectVanswer-
combustibleVgas,VadequateVoxygen,VheatVandVproperVmixingVofVgasVandVoxygen

whatVdoesVtheV"transitionVarea"VmeanVinVtrafficVcontrol?V-VcorrectVanswer-
ItVmovesVtrafficVoutVofVitsVnormalVpath

whatVelementsVshouldVbeVconsideredVtoVimproveVworkerVsafetyVinVHighVspeedVTempor
aryVTrafficVcontrolVZones?V-VcorrectVanswer-
ReroutingVtrafficVaroundVtheVworkVsite,VpositioningVofVlawVenforcementVofficersVinVtheVt
emporaryVtrafficVcontrolVzone,VandVworkVzoneVtraining

WhatVkeyVfeaturesVwouldVyouVneedVtoVaddressVwhenVdevelopingVanVS.O.P.VforVaVLiftVS
tationVfailure?V-VcorrectVanswer-TrafficVControlVPlan,VBy-
PassVconnections,VandVSpillVcontainment

WhatVtoolsVareVusedVwithVaVpowerVrodder?V-VcorrectVanswer-SpringVBlades

ToolsVusedVforVsewerVroddingVinclude:V-VcorrectVanswer-
porcupine,VrootVsaw,VsquareVbarVcorkVscrew

WhatVtoolVwouldVyouVuseVtoVcutVVCPVpipe?V-VcorrectVanswer-ChainVPipeVCutter

WhichVconditionsVshouldVaVgasVdetectionVdeviceVtestVfor?V-VcorrectVanswer-
HydrogenVsulfide,Vexplosive/flammableVgases,Voxygen

WhatVdoesV"LEL"VmeanVonVaVgasVdetectionVmeter?V-VcorrectVanswer-
LowerVExplosiveVLimit

TheVoxygenVlevelValarmVnormallyVgoesVoffVifVoxygenVlevelsVareVbelow:V-
VcorrectVanswer-19.5Vpercent




WhenVdevelopingVanVS.O.P.VforVscheduledVmaintenanceVofVelectricalVequipment,Vwhat
VprogramVshouldVbeVaddressedVasVaVprimaryVsafetyVguideline?V-VcorrectVanswer-

TheVL.O.T.OVProgram

WhatVdoesVL.O.T.O.VStandVfor?V-VcorrectVanswer-LockVoutVtagVout

WhatVdocumentVwouldVyouVrequireVtoVbeVreferencedVwhenVdevelopingVanVS.O.p.VforVh
azardousVsubstaceVspillVcleanVup?V-VcorrectVanswer-M.S.D.S.

inVdevelopingVanVS.O.P.VforVairVmonitoringVinVaVPermitVRequiredVConfinedVSpaceVyouV
wouldVincludeVwhatVtwoVfactors?V-VcorrectVanswer-
PlacementVofVtheVblowerVandVaVweatherVforecast

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