WATER OPERATOR CLASS 3- PRACTICE TEST LATEST 2026/2027 ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

WATER OPERATOR CLASS 3-
PRACTICE TEST LATEST 2026/2027
ACTUAL EXAM QUESTIONS WITH
CORRECT ANSWERS 100% VERIFIED
GRADED A+
1. 0.08mppmm-mCORRECTmANSWERmMCLmformTTHM's



2. 0.06mppmm-mCORRECTmANSWERmMCLmformHAA5's



0.01 ppmm-mCORRECTmANSWERmMCLmformArsenic



3. 0.015mppmm-mCORRECTmANSWERmMCLmformLead



4. 90mdaysm-mCORRECTmANSWERmTurbiditymmetermmustmbemcalibratedmevery:



5. Lessmthanm0.3mform95%mofmthemtime.m-mCORRECTmANSWERmMCLmformturbiditymis



1 buffersm-mCORRECTmANSWERmpHmmetersmmustmbemcalibratedmusing



6. Algaembloomsm-mCORRECTmANSWERmAmgrassymofmfishymtasteminmreservoirmwatermindicates



7. Impropermbackwashingmofmfiltersm-mCORRECTmANSWERmMudballsmaremcausedmby



8. Carbonatem-mCORRECTmANSWERmLimemcanmonlymbemusedmtomsoftenmwatermwith

, 9. 0mppmm-mCORRECTmANSWERmWatermleavingmZeolitemsoftenermhasmamhardnessmof



10. Schmutzdeckem-mCORRECTmANSWERmThemtopmlayermofmamslowmsandmfiltermismcalledmthe



11. Coagulation,mflocculation,msedimentationm-
mCORRECTmANSWERmAmsolidsmcontactmunitmcombines




12. 4mppm,m2mppmm-mCORRECTmANSWERmThemPMCLmformfluoridemis:mThemSMCLmis:



13. Warmerm-mCORRECTmANSWERmFlockmwillmsettlembetterminmwarmmormcoolmwater?



14. HighmpHm-mCORRECTmANSWERmThemgreensandmmanganesemremovalmprocessmrequiresma:



15. Volatilemorganicmcompoundsm&mgasesm(odor)m-
mCORRECTmANSWERmAerationmreleasesmwhatmfrommwater?




16. Amperomaticmtirationm-
mCORRECTmANSWERmThemmostmaccuratemmethodmofmdeterminingmchlorinemresidualmis:




17. Sulfuricmacidm-mCORRECTmANSWERmAnmalkalinitymsamplemismtitratedmusing



18. Mixingmandmmeasuringm-mCORRECTmANSWERmAmbeakermismusedmfor



19. Nephelometricmturbiditymunitsm-mCORRECTmANSWERmNTUmstandsmfor:



20. 5myears,m10myearsm-
mCORRECTmANSWERmBacteriamresultsmmustmbemkeptmfor:mChemmresultsmfor: