Water Operator Class 3-Practice Test Questions EXAM, /GET IT 100% ACCU
RATE!! 2026!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
1. 0.08 ppm MCL for TTHM's
2. 0.06 ppm MCL for HAA5's
3. 0.01 ppm MCL for Arsenic
4. 0.015 ppm MCL for Lead
5. 90 days Turbidity meter must be calibrated every:
6. Less than 0.3 for 95% MCL for turbidity is
of the time.
7. 2 buffers pH meters must be calibrated using
8. Algae blooms A grassy of fishy taste in reservoir water indicates
9. Improper backwash- Mudballs are caused by
ing of filters
10. Carbonate Lime can only be used to soften water with
11. 0 ppm Water leaving Zeolite softener has a hardness of
12. Schmutzdecke The top layer of a slow sand filter is called the
13. Coagulation, floccula- A solids contact unit combines
tion, sedimentation
14. 4 ppm, 2 ppm The PMCL for fluoride is: The SMCL is:
15. Warmer Flock will settle better in warm or cool water?
16. High pH The greensand manganese removal process requires a:
, Water Operator Class 3-Practice Test Questions EXAM, /GET IT 100% ACCU
RATE!! 2026!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
17. Volatile organic com- Aeration releases what from water?
pounds & gases
(odor)
18. Amperomatic tiration The most accurate method of determining chlorine residual is:
19. Sulfuric acid An alkalinity sample is titrated using
20. Mixing and measur- A beaker is used for
ing
21. Nephelometric tur- NTU stands for:
bidity units
22. 5 years, 10 years Bacteria results must be kept for: Chem results for:
23. Tubrbine, Propeller, Four ways water meters operate are:
Venturi, Nutating
discs
24. Procedure, Part, Bud- A preventative maintenance program includes:
get, Cost
25. Lower insurance An advantage of a standpipe:
rates
26. Geographic Informa- What is GIS?
ton System
27. Cavitation (boiling) High flow rates in pumps can cause.
28. Mechanical rakes, Three ways sludge is removed from a settling basin are
drag chain, traveling
bridges
RATE!! 2026!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
1. 0.08 ppm MCL for TTHM's
2. 0.06 ppm MCL for HAA5's
3. 0.01 ppm MCL for Arsenic
4. 0.015 ppm MCL for Lead
5. 90 days Turbidity meter must be calibrated every:
6. Less than 0.3 for 95% MCL for turbidity is
of the time.
7. 2 buffers pH meters must be calibrated using
8. Algae blooms A grassy of fishy taste in reservoir water indicates
9. Improper backwash- Mudballs are caused by
ing of filters
10. Carbonate Lime can only be used to soften water with
11. 0 ppm Water leaving Zeolite softener has a hardness of
12. Schmutzdecke The top layer of a slow sand filter is called the
13. Coagulation, floccula- A solids contact unit combines
tion, sedimentation
14. 4 ppm, 2 ppm The PMCL for fluoride is: The SMCL is:
15. Warmer Flock will settle better in warm or cool water?
16. High pH The greensand manganese removal process requires a:
, Water Operator Class 3-Practice Test Questions EXAM, /GET IT 100% ACCU
RATE!! 2026!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
17. Volatile organic com- Aeration releases what from water?
pounds & gases
(odor)
18. Amperomatic tiration The most accurate method of determining chlorine residual is:
19. Sulfuric acid An alkalinity sample is titrated using
20. Mixing and measur- A beaker is used for
ing
21. Nephelometric tur- NTU stands for:
bidity units
22. 5 years, 10 years Bacteria results must be kept for: Chem results for:
23. Tubrbine, Propeller, Four ways water meters operate are:
Venturi, Nutating
discs
24. Procedure, Part, Bud- A preventative maintenance program includes:
get, Cost
25. Lower insurance An advantage of a standpipe:
rates
26. Geographic Informa- What is GIS?
ton System
27. Cavitation (boiling) High flow rates in pumps can cause.
28. Mechanical rakes, Three ways sludge is removed from a settling basin are
drag chain, traveling
bridges
