Florida Class C Water Treatment Operator Exam 2026 Prep Test Bank with 800 Most Recent Questions COMPLETE WITH 100% Verified Answers/ FL Class C Water Operator Test

Florida Class C Water Treatment Operator Exam 2026 Prep Test Bank with 800 Most Recent Questions COMPLETE WITH 100% Verified Answers/ FL Class C Water Operator Test Question 1 To obtain a "C" water license, an operator must have ______ hours of on the job training. A. 1,040 B. 2,080 C. 4,160 D. 520 Correct Answer: B. 2,080 Question 2 The chief operator for a class "B" WTP needs what level of license? A. A B. C C. B D. D Correct Answer: C. B Question 3 A "B" class WTP must have a "C" operator or higher on duty for ______. A. 8 hrs a day / 5 days a week B. 16 hrs a day / 7 days a week C. 12 hrs a day / 7 days a week D. 24 hrs a day / 5 days a week Correct Answer: B. 16 hrs a day / 7 days a week Question 4 E-coli broth is used when testing for _____. A. total coliform B. heterotrophic bacteria C. fecal coliform D. pseudomonas Correct Answer: C. fecal coliform Question 5 Chlorine should never be fed ahead of ___? A. alum B. polymer C. lime D. polyphosphates Correct Answer: D. polyphosphates Question 6 The distribution system has complaints of pink water. The WTP has a greensand filter. What is most likely the cause? A. Overdose of chlorine B. Overdose of potassium permanganate C. Iron bacteria D. Algae bloom Correct Answer: B. Overdose of potassium permanganate Question 7 The addition of chlorine to water until the demand is satisfied and every drop of water after that is free residual is called? A. Superchlorination B. Break point chlorination C. Dechlorination D. Combined chlorine residual Correct Answer: B. Break point chlorination Question 8 Adding alum to water _____ the pH level. A. raises B. lowers C. does not change D. doubles Correct Answer: B. lowers Question 9 A common membrane used in reverse osmosis water treatment is ____. A. Polyamide B. Polysulfone C. Cellulose acetate D. Polyvinylidene fluoride Correct Answer: C. Cellulose acetate Question 10 All surface water and ground water under the influence of surface water must be _____. A. disinfected only B. filtered only C. disinfected and filtered D. softened only Correct Answer: C. disinfected and filtered Question 11 What is the action level for lead? A. 0.005 mg/L B. 0.010 mg/L C. 0.015 mg/L D. 0.020 mg/L Correct Answer: C. 0.015 mg/L Question 12 What is the maximum chlorine residual level allowed in the distribution system? A. 2.0 mg/L B. 4.0 mg/L C. 1.0 mg/L D. 10.0 mg/L Correct Answer: B. 4.0 mg/L Question 13 For water systems using chlorine dioxide, what is the MCL for chlorite? A. 0.5 mg/L B. 2.0 mg/L C. 1.0 mg/L D. 4.0 mg/L Correct Answer: C. 1.0 mg/L Question 14 What is the MCL for color? A. 5 B. 10 C. 20 D. 15 Correct Answer: D. 15 Question 15 The MCL for turbidity is not more than ____ NTU as a monthly average. A. 0.1 B. 1.0 C. 0.3 D. 0.5 Correct Answer: D. 0.5 Question 16 The WTP uses 360 gallons of 10% NaOCl a day. How many pounds of Cl₂ do they use? A. 150 B. 400 C. 200 D. 300 Correct Answer: D. 300 Question 17 When chlorine is added to water, it is a more efficient disinfectant when the pH is lower and a greater percentage of _____ is present. A. OCl⁻ B. Cl₂ C. ClO₂ D. HOCl Correct Answer: D. HOCl