WASTE WATER D LICENSE STUDY LATEST 2026/2027 ACTUAL EXAM WITH 330 QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

WASTEWATER D LICENSE EXAM
LATEST 2026/2027 ACTUAL EXAM
WITH 300 QUESTIONS WITH
CORRECT ANSWERS 100% VERIFIED
GRADED A+
1. HowmmanymPPBmequalsmonemPPM?m-
mCORRECTmANSWERmOnemthousandmpartsmpermbillionmequalsmonempartmpermmillion




2. Ifmthembubblermsystemmairmsupplymlinematmthemwetmwellmismclogged,mwhatmwillmthismcausemt
hempumpmtomdo?m-
mCORRECTmANSWERmPressurembuildmupminmthemsupplymlinemwouldmsignalmmoremwatermcol


umnmthenmtheremreallymwas,mcausingmthempumpmtomrunmlongermthanmnecessary,mpossiblym
notmkickmoffmandmrunmcontinually



3. Ifmthembubblermsystemmairmsupplymlinematmthemwetmwellmhasmamholeminmitmabovemthemwaterm
level,mwhatmwillmthismcausemthempumpmtomdo?m-
mCORRECTmANSWERmItmwouldmcausemamlowmpressuremreadingmshowingmamlowermwatermlev


elmthenmtheremreallymis,mormpossiblemnotmevenmkickingmonmthempump



4. Whatmismthembestmwaymtomkeepmwithinmthemoperatingmbudget?m-
mCORRECTmANSWERmkeepmlistmofmpurchasesmandmexpensesmtomdatemduringmfiscalmyear




5. comparisonsmshouldmbemmademwithmbudgetmallocationsmtomavoidmexcessmpurchases



6. reviewmpurchasesmmonthlymandmcomparemtombudget



7. Ifmamdiaphragmmpumpmhasm2mcheckmvalvesmopen,mwhatmwillmthempumpmdo?m-
mCORRECTmANSWERmItmwouldmnotmpumpmproperlymbecausem1mcheckmvalvemshouldmbemshu


tmwhilemthemothermismopen

,8. Amsuctionmliftmpumpmonmtheminletmsidemnormallymreadsm2inmofmmercurymonmthempsimvacuu
mmgaugembutmnotmreadsm3inmofmmercury.mWhatmismthemproblemmwithmthempump?m-
mCORRECTmANSWERmAmhighermvacuummthanmnormalmmaymindicatemampartiallympluggedmor


mrestrictedmsuctionmline.m




9. Amlowermvacuummmaymindicatemamhighermwetmwellmlevelmormamwornmpumpmimpellermormwe
aringmrings.



10. OnemmgmpermLmequalsmhowmmanympoundsmperm1mMG?m-mCORRECTmANSWERm8.34



11. Whatmismthempropermwaymtomputmpackingminmampump?m-
mCORRECTmANSWERmcutmthempackingmropemaboutm45mdegreemangle,mplacemaroundmshaft,m


bemsuremtomoffset/staggermthemnextmjointmfrommthemprevious



12. Howmmanymdripsmofmwatermshouldmyoumhavemcomingmoutmofmampackingmseal?m-
mCORRECTmANSWERmnomdripmonmammechanicalmseal




13. Howmmanymdripsmofmwatermshouldmyoumhavemcomingmoutmofmampackingmseal?m2m-
mCORRECTmANSWERmwhatmthemoperationmandmmaintenancemmanualmrecommends




14. Amonemhorsepowermmotormthatmrunsmonm110mvoltsmusingm10mampsmhasmwhatmefficiency?m-
mCORRECTmANSWERmmostmmotorsmrunmfromm80-95%mefficiency




15. Ammotormthatmhasm440mvoltmsupplymismusuallymwhatmphasemofmpower?m-
mCORRECTmANSWERm3mphase




16. NPDESm-mCORRECTmANSWERmNationalmPollutantmDischargemEliminationmSystem

,17. themregulatorymagencymdocumentmissuedmbymeithermamfederalmormstatemagencymwhichmismd
esignedmtomcontrolmallmdischargesmofmpollutantsmfrommpointmsourcesmintomUSmwaterwaysm-
mCORRECTmANSWERmNPDESmpermit




18. Whatmismthemnamemofmourmoperatingmpermit?m-mCORRECTmANSWERmNPDES



19. Whatmismthembestmwaymtompromotemsafetyminmthemworkplace?m-
mCORRECTmANSWERmthemsupervisormneedsmtombemsafemandmpromotemsafetyminmsuchmamma


nnermtomgetmthememployeesminvolved



20. WhatmismnormallymusedmtomraisemthempHminmsludge?m-mCORRECTmANSWERmlime



21. Whatmismthemcommonmdevicemusedmtommeasuremthemeffluentmofmamlagoon?m-
mCORRECTmANSWERmvmnotchmweir




22. WhatmconcentrationmofmH2Smismunsafemtomhumans?m-
mCORRECTmANSWERmdeathminmamfewmminutesmatm0.2%.mParalyzesmrespiratorymcenter




23. WhatmismthemminimummO2mconcentrationmthatmismsafemformworkersmtomentermammanhole?m
-
mCORRECTmANSWERmIfmO2mismlessmthanm19.5%,mdomnotmentermspacemwithoutmrespiratorym


protection.mNormalmairmcontainsm20.93%mofmO2.



24. Normalmairmcontainsm______%mofmO2m-mCORRECTmANSWERm19.5%



25. Whatmknobmismturnedmtomcontrolmthemusagemofmchlorinemapplied?m-
mCORRECTmANSWERmrotameter




26. CanmyoumstoremBODmatm4Cmform48mhours?m-mCORRECTmANSWERmyes

, 27. Whatmismthemminimummvelocitymofmthemwatermflowmformamgritmchambermandmthemmaximu
mmflow?m-mCORRECTmANSWERm1.0mfeetmpermsecondmminimum
28. 1.5mfeetmpermsecondmoptimum
29. 2.0mfeetmpermsecondmmaximum



30. Howmmanymmg/Lmequalsmonemgrainmpermgallon?m-mCORRECTmANSWERm17.1mmg/L



31. Dissolvedmoxygenmincreasesmwhenmthemtemperaturem__________m-
mCORRECTmANSWERmdecreases




32. Youmcanmtellmifmamclarifiermscrapermarmmismworkingmbymwhatmmeans?m-
mCORRECTmANSWERmthemsimplestmismtomvisualmcheckmtomseemifmthemscummscrapermarmmism


movingmproperlym



33. checkmintomfoam



34. Ifmthemsludgemismthickmormthin,mthenmwhatmdoesmthismtellmyoumaboutmthemsludgemscraper?m-
mCORRECTmANSWERmpossiblemanswermismthemflightsmaremdamagedmormthemspeedmofmthemsc


rapers(flights)mneedmtombemincreasedmifmsludgemismtoomthick



35. ormslowedmdownmifmthemsludgemismtoomthin



36. agingmandmmaturingmofmambodymofmwaterm-mCORRECTmANSWERmeutrophication



37. eutrophicationm-mCORRECTmANSWERmagingmandmmaturingmofmambodymofmwater



38. Ifmthemeffluentmfrommamtreatmentmfacilitymcontainedm5mg/LmofmBOD,mwhatmeffectmwouldmt
hismhavemonmthemreceivingmstream?m-mCORRECTmANSWERmlittlemeffect