AWWA WATER OPERATOR
CERTIFICATION EXAM PREP LATEST
2026/2027 ACTUAL EXAM QUESTIONS
WITH CORRECT ANSWERS 100%
VERIFIED GRADED A+
1. WhatmismthemareamofmamcircularmclarifierminmFt^2mifmitmhasmamdiametermofm125mft?m-
mCORRECTmANSWERm
2. Whatmismthemsurfacemloadingmratemformamsedimentationmbasinmthatmism125mftmbym68mftmifmitm
ismtreatingmanminstantaneousmflowmofm4.75mft^3/sm-mCORRECTmANSWERm
3. Whatmismthemmostmcommonmdisinfectionmbymproductmwhenmaddingmchlorinemtomwatermco
ntainingmnaturalmandminorganicmmatter?m-mCORRECTmANSWERm
4. Whatmismthemvelocitymofmflowminmft/smformamdiametermpipemifmitmdeliversm178mgpm?m-
mCORRECTmANSWERm
5. whatmwillmmostmprobabalymcausemtastemandmodors,mslimemandmfiltermclogging?m-
mCORRECTmANSWERm
6. Whymcanmrapidmsandmfiltersmhandlemhighermfiltrationmratemcomparedmtomslowmsandmfiltersm
-mCORRECTmANSWERm
7. WhatmshouldmthemchemicalmfeedermsettingmbeminmmL/minmformampolymermsoulutionmifmthem
desiredmdosagemism3.50mmg/lmandmthemtreatmentmplantmismtreatingm13.7mmgd?mThemspecifi
cmgravitymofmthempolymermism1.28.m-mCORRECTmANSWERm
, 8. Ironmbacteriamcanminterferemwithm________________mbecausemthembacteriamproducem___
______mthatmpreventsmthemstabilizationmchemicalsmfrommreachingmthempipemsurface.m-
mCORRECTmANSWERm
9. HypochlorusmacideismfavoredmovermhypochloritemionmwhenmthempHmism_________mandmthe
mtemperaturemism__________.m-mCORRECTmANSWERm
10. Whatmfiltermhasmanmunstratifiedmmediamdistribution?m-mCORRECTmANSWERm
11. Amwellmproducesm97mgpm.mIfmthemdrawdownmformthemwellmism22ft,mWhatmismthemspecificmyi
eldminmgpm/ft?m-mCORRECTmANSWERm
12. Whatmis(are)mthemcombinedmchlorinemresidual(s)matmpHmvaluesmrangingmformm6.5mtom8.5?m-
mCORRECTmANSWERm
13. Ifmthemtotalmhardnessmofmamwatermsamplemism97mmg/LmasmCaCO3mandmthemcalciummhardnes
smism81mmg/LmasmCaCo3,mwhatmismthemmagnesiummhardnessm-mCORRECTmANSWERm
14. Whenmironmalonemismtreatedmusingmmanganesemgreensandmfilters,mthemchlorinemfeedmratem
shouldmbemaboutm_______.m-mCORRECTmANSWERm
15. Chlorinationmofmwatermthatmhasmhighmconcentrationmofmnaturalmorganicmmattermwillmprodu
ce.m-mCORRECTmANSWERm
16. Whenmdisinfectingmwithmchloramines,mwhenmcanmthemammoniambemaddedmtomthemprocess
?m-mCORRECTmANSWERm
17. Whatmwillmsettlemoutmofmthemwaterminmamshortmperiodmofmtime?m-mCORRECTmANSWERm
CERTIFICATION EXAM PREP LATEST
2026/2027 ACTUAL EXAM QUESTIONS
WITH CORRECT ANSWERS 100%
VERIFIED GRADED A+
1. WhatmismthemareamofmamcircularmclarifierminmFt^2mifmitmhasmamdiametermofm125mft?m-
mCORRECTmANSWERm
2. Whatmismthemsurfacemloadingmratemformamsedimentationmbasinmthatmism125mftmbym68mftmifmitm
ismtreatingmanminstantaneousmflowmofm4.75mft^3/sm-mCORRECTmANSWERm
3. Whatmismthemmostmcommonmdisinfectionmbymproductmwhenmaddingmchlorinemtomwatermco
ntainingmnaturalmandminorganicmmatter?m-mCORRECTmANSWERm
4. Whatmismthemvelocitymofmflowminmft/smformamdiametermpipemifmitmdeliversm178mgpm?m-
mCORRECTmANSWERm
5. whatmwillmmostmprobabalymcausemtastemandmodors,mslimemandmfiltermclogging?m-
mCORRECTmANSWERm
6. Whymcanmrapidmsandmfiltersmhandlemhighermfiltrationmratemcomparedmtomslowmsandmfiltersm
-mCORRECTmANSWERm
7. WhatmshouldmthemchemicalmfeedermsettingmbeminmmL/minmformampolymermsoulutionmifmthem
desiredmdosagemism3.50mmg/lmandmthemtreatmentmplantmismtreatingm13.7mmgd?mThemspecifi
cmgravitymofmthempolymermism1.28.m-mCORRECTmANSWERm
, 8. Ironmbacteriamcanminterferemwithm________________mbecausemthembacteriamproducem___
______mthatmpreventsmthemstabilizationmchemicalsmfrommreachingmthempipemsurface.m-
mCORRECTmANSWERm
9. HypochlorusmacideismfavoredmovermhypochloritemionmwhenmthempHmism_________mandmthe
mtemperaturemism__________.m-mCORRECTmANSWERm
10. Whatmfiltermhasmanmunstratifiedmmediamdistribution?m-mCORRECTmANSWERm
11. Amwellmproducesm97mgpm.mIfmthemdrawdownmformthemwellmism22ft,mWhatmismthemspecificmyi
eldminmgpm/ft?m-mCORRECTmANSWERm
12. Whatmis(are)mthemcombinedmchlorinemresidual(s)matmpHmvaluesmrangingmformm6.5mtom8.5?m-
mCORRECTmANSWERm
13. Ifmthemtotalmhardnessmofmamwatermsamplemism97mmg/LmasmCaCO3mandmthemcalciummhardnes
smism81mmg/LmasmCaCo3,mwhatmismthemmagnesiummhardnessm-mCORRECTmANSWERm
14. Whenmironmalonemismtreatedmusingmmanganesemgreensandmfilters,mthemchlorinemfeedmratem
shouldmbemaboutm_______.m-mCORRECTmANSWERm
15. Chlorinationmofmwatermthatmhasmhighmconcentrationmofmnaturalmorganicmmattermwillmprodu
ce.m-mCORRECTmANSWERm
16. Whenmdisinfectingmwithmchloramines,mwhenmcanmthemammoniambemaddedmtomthemprocess
?m-mCORRECTmANSWERm
17. Whatmwillmsettlemoutmofmthemwaterminmamshortmperiodmofmtime?m-mCORRECTmANSWERm