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

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

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6 pages

2025/2026

Institution ARIZONA WATER TREATMENT OPERATOR CERTIFICATION

Course ARIZONA WATER TREATMENT OPERATOR CERTIFICATION

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

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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

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Uploaded on: May 11, 2026
Number of pages: 6
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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