ABC Wastewater Treatment Grade 3 LATEST 2026/2027 ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

ABC Wastewater Treatment Grade 3
LATEST 2026/2027 ACTUAL EXAM
QUESTIONS WITH CORRECT
ANSWERS 100% VERIFIED GRADED
A+
1. BODmincubationmperiodmandmtemperaturem-mCORRECTmANSWERm5mdaysmatm20mC



2. TimemtomholdmBODmsampleminmfridgem-mCORRECTmANSWERm48mhoursm4mC



3. WhatmpreservativemdomyoumaddmtomstoremCODmsamples?m-
mCORRECTmANSWERmSulfuricmAcidmH2SO4




4. Ammoniamincubationmperiodmandmtemperaturem-mCORRECTmANSWERm28mdaysmatm4mC



5. WhatmpreservativemdomyoumaddmtomstoremAmmoniam-
mCORRECTmANSWERmSulfuricmAcidmH2SO4




6. FecalmColiformmholdingmtimemism-mCORRECTmANSWERm8mhours



7. Amdripmtrapmformanmanaerobicmdigestermdoesmwhatm-
mCORRECTmANSWERmRemovesmcondensateminmthemgasmpipingmsystem




8. ChemicalmusedmtomraisempHminmamdigesterm-
mCORRECTmANSWERmSodiummbicarbonatemormLime




9. WhatmcausesmthempHminmanmanaerobicmdigestermtomdecreasem-
mCORRECTmANSWERmIncreaseminmvolatile/alkalinitymratio

, 10. Heterotrophsmfeedmonm-mCORRECTmANSWERmOrganicmcarbon



11. Autotrophsmfeedmonm-
mCORRECTmANSWERmInorganicmcarbon.mTheymproducemtheirmownmnutrients.




12. Ensuremaccuratemlabmresultsmthroughm-mCORRECTmANSWERmduplicity



13. Whichmismlarger,mBODmormCOD?m-mCORRECTmANSWERmCODmismlarger



14. Phosphorousmremovalmratiomofm300:5:1m-
mCORRECTmANSWERmCODm:mNitrogenm:mPhosphorous




15. Phosphorousmremovalmratiomofm100:5:1m-
mCORRECTmANSWERmBODm:mNitrogenm:mPhosphorous




16. Pumpmefficiencymwithm86%mpumpmpowermandm86%mmotormfunctionalitym-
mCORRECTmANSWERm73.96%




17. Firstmstagemofmanmupsetmdigester?m-
mCORRECTmANSWERmVolatilemacidsmincrease,malkalinitymdecrease




18. Digestermtemperaturemcanmbemraisedmbymhowmmuchmpermday?m-mCORRECTmANSWERm1mF



19. Averagemtemperaturemofmanmanaerobicmdigester?m-mCORRECTmANSWERm95mF



20. BeltmPressmThickenermsolidsmaremthinmsomyoum-
mCORRECTmANSWERmdecreasemthembeltmretentionmtime