Pool Operator's Final Exam Correct 100%(RATED A+)

The percentage of hypoclorous acid formation is most influenced by: - ANSWER pH Pool painting is usually done: - ANSWER Before opening in the spring When a pool is chlorinated with gas chlorine, the operator must also use: - ANSWER Soda Ash The term "chlorine demand" refers to: - ANSWER The amount of chlorine which will react with substances in the pool Re-circulation pumps used in swimming pools are the type called: - ANSWER Centrifugal pumps Reversing the flow of water through the filters is called: - ANSWER Backwash "Slurry feed" or "body feed" refers to: - ANSWER Diatomite added during a filter run The term pH is determined by the concentration of: - ANSWER Hydrogen ions Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: - ANSWER Rise When enough chlorine is added to cause complete oxidation of all organic compounds, a sudden drop in residual chlorine may be noticed. The point at which this occurs is called the: - ANSWER Break-point "Residual chlorine" refers to: - ANSWER The amount left in the water after oxidation of organic material Which of the following is NOT considered a swimming pool disinfectant: - ANSWER Chlorinated hydrocarbons When chlorine is used as a disinfectant for swimming pools, the form in which it's disinfectant properties are the greatest is: - ANSWER Hypochlorous acid The chemical most commonly used to raise pH is: - ANSWER Sodium carbonate An example of a chemical used to stabilize chlorine is: - ANSWER Cyanuric acid T