FLORIDA WASTEWATER OPERATOR CLASS B
EXAM FINAL SCRIPT 2026 COMPLETE
SOLUTION SET
◉ main purpose of coagulation in water treatment. Answer: To
destabilize and aggregate suspended particles for removal.
◉ CT in water treatment. Answer: The product of disinfectant
concentration (C) and contact time (T).
◉ maximum contaminant level (MCL) for nitrate in drinking water.
Answer: 10 mg/L as nitrogen.
◉ purpose of backwashing a filter. Answer: To remove trapped
particles and restore the filter's efficiency.
◉ main purpose of sedimentation. Answer: To allow heavier
particles to settle out of the water.
◉ amount of oxygen required to oxidize organic matter in water.
Answer: Biochemical Oxygen Demand (BOD).
,◉ chemical used to lower pH in water treatment. Answer: Sulfuric
acid or carbon dioxide.
◉ most common indicator of biological contamination in drinking
water. Answer: Total coliform bacteria.
◉ turbidity in water treatment. Answer: The cloudiness or haziness
of water caused by suspended particles.
◉ standard test for determining hardness in water. Answer: EDTA
titration.
◉ main health concern of high levels of fluoride in drinking water.
Answer: Dental fluorosis.
◉ purpose of aeration in water treatment. Answer: To remove
dissolved gases like carbon dioxide and hydrogen sulfide and to
oxidize iron and manganese.
◉ typical detention time for sedimentation basins. Answer: 2-6
hours.
◉ role of activated carbon in water treatment. Answer: To remove
organic compounds, tastes, and odors.
, ◉ primary cause of corrosion in water distribution systems. Answer:
Low pH and high dissolved oxygen levels.
◉ common method used for corrosion control in water systems.
Answer: Addition of corrosion inhibitors like orthophosphates.
◉ purpose of water softening in treatment processes. Answer: To
remove hardness-causing minerals, primarily calcium and
magnesium.
◉ chemical used in the lime-soda ash softening process. Answer:
Calcium hydroxide (lime).
◉ disinfection byproducts (DBPs). Answer: Compounds formed
when disinfectants react with natural organic matter in water.
◉ common disinfection byproducts regulated in drinking water.
Answer: Trihalomethanes (THMs) and haloacetic acids (HAAs).
◉ maximum contaminant level (MCL) for total trihalomethanes
(TTHMs) in drinking water. Answer: 0.080 mg/L.
EXAM FINAL SCRIPT 2026 COMPLETE
SOLUTION SET
◉ main purpose of coagulation in water treatment. Answer: To
destabilize and aggregate suspended particles for removal.
◉ CT in water treatment. Answer: The product of disinfectant
concentration (C) and contact time (T).
◉ maximum contaminant level (MCL) for nitrate in drinking water.
Answer: 10 mg/L as nitrogen.
◉ purpose of backwashing a filter. Answer: To remove trapped
particles and restore the filter's efficiency.
◉ main purpose of sedimentation. Answer: To allow heavier
particles to settle out of the water.
◉ amount of oxygen required to oxidize organic matter in water.
Answer: Biochemical Oxygen Demand (BOD).
,◉ chemical used to lower pH in water treatment. Answer: Sulfuric
acid or carbon dioxide.
◉ most common indicator of biological contamination in drinking
water. Answer: Total coliform bacteria.
◉ turbidity in water treatment. Answer: The cloudiness or haziness
of water caused by suspended particles.
◉ standard test for determining hardness in water. Answer: EDTA
titration.
◉ main health concern of high levels of fluoride in drinking water.
Answer: Dental fluorosis.
◉ purpose of aeration in water treatment. Answer: To remove
dissolved gases like carbon dioxide and hydrogen sulfide and to
oxidize iron and manganese.
◉ typical detention time for sedimentation basins. Answer: 2-6
hours.
◉ role of activated carbon in water treatment. Answer: To remove
organic compounds, tastes, and odors.
, ◉ primary cause of corrosion in water distribution systems. Answer:
Low pH and high dissolved oxygen levels.
◉ common method used for corrosion control in water systems.
Answer: Addition of corrosion inhibitors like orthophosphates.
◉ purpose of water softening in treatment processes. Answer: To
remove hardness-causing minerals, primarily calcium and
magnesium.
◉ chemical used in the lime-soda ash softening process. Answer:
Calcium hydroxide (lime).
◉ disinfection byproducts (DBPs). Answer: Compounds formed
when disinfectants react with natural organic matter in water.
◉ common disinfection byproducts regulated in drinking water.
Answer: Trihalomethanes (THMs) and haloacetic acids (HAAs).
◉ maximum contaminant level (MCL) for total trihalomethanes
(TTHMs) in drinking water. Answer: 0.080 mg/L.
