AQUATIC FACILITY OPERATOR EXAM 2025 QUESTIONS
WITH SOLUTIONS RATED A+
✔✔What is oxidation? - ✔✔a chemical process that destroys organic compounds in the
pool water
✔✔What is disinfection? - ✔✔the chemical process that kills or deactivates pathogens
✔✔What does oxidation do? - ✔✔destroys organics
✔✔What does sanitation do? - ✔✔destroys bacteria
✔✔What does poor oxidation result in? - ✔✔cloudy turbid water
✔✔What is the desirable chlorine compound? - ✔✔HOCl
✔✔Why is HOCl the desirable chlorine compound? - ✔✔because it oxidizes AND
sanitizes
✔✔When is HOCl produced? - ✔✔Upon gas chlorine, sodium hypochlorite (bleach) or
calcium hypochlorite being added to water
✔✔pH of soda ash - ✔✔dissolved in water pH 13+
✔✔Safety considerations for chemical handling require what? - ✔✔eye wash station
✔✔When are chloramines formed? - ✔✔under a heavy organic load with low chlorine
levels, often with limited air movement
✔✔How do you get rid of chloramines? - ✔✔you super chlorinate
✔✔How do you obtain combined chlorine? - ✔✔(TC)-(FC) = combined chlorine
✔✔How do you calculate breakpoint calculation? - ✔✔multiply CC by 10
✔✔What should you always do when handling chemicals? - ✔✔wear protective
equipment
✔✔For CSI, what does negative/positive mean - ✔✔Negative = aggressive
Positive = scaling
✔✔What is the most influential variable in the CSI? - ✔✔pH
WITH SOLUTIONS RATED A+
✔✔What is oxidation? - ✔✔a chemical process that destroys organic compounds in the
pool water
✔✔What is disinfection? - ✔✔the chemical process that kills or deactivates pathogens
✔✔What does oxidation do? - ✔✔destroys organics
✔✔What does sanitation do? - ✔✔destroys bacteria
✔✔What does poor oxidation result in? - ✔✔cloudy turbid water
✔✔What is the desirable chlorine compound? - ✔✔HOCl
✔✔Why is HOCl the desirable chlorine compound? - ✔✔because it oxidizes AND
sanitizes
✔✔When is HOCl produced? - ✔✔Upon gas chlorine, sodium hypochlorite (bleach) or
calcium hypochlorite being added to water
✔✔pH of soda ash - ✔✔dissolved in water pH 13+
✔✔Safety considerations for chemical handling require what? - ✔✔eye wash station
✔✔When are chloramines formed? - ✔✔under a heavy organic load with low chlorine
levels, often with limited air movement
✔✔How do you get rid of chloramines? - ✔✔you super chlorinate
✔✔How do you obtain combined chlorine? - ✔✔(TC)-(FC) = combined chlorine
✔✔How do you calculate breakpoint calculation? - ✔✔multiply CC by 10
✔✔What should you always do when handling chemicals? - ✔✔wear protective
equipment
✔✔For CSI, what does negative/positive mean - ✔✔Negative = aggressive
Positive = scaling
✔✔What is the most influential variable in the CSI? - ✔✔pH
