Pool Operator's Final Exam With 77 Questions and answers Updated 2025/26

Pool Operator's Final Exam With 77
Questions and answers Updated 2025/26
The percentage of hypoclorous acid formation is most influenced by: - Correct Answers pH
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II! Pool painting is usually done: - Correct Answers Before opening in the spring
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II! When a pool is chlorinated with gas chlorine, the operator must also use: - Correct Answers Soda Ash
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II! The term "chlorine demand" refers to: - Correct Answers The amount of chlorine which will react with
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II! substances in the pool II! II! II!




II! Re-circulation pumps used in swimming pools are the type called: - Correct Answers Centrifugal pumps
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II! Reversing the flow of water through the filters is called: - Correct Answers Backwash
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II! "Slurry feed" or "body feed" refers to: - Correct Answers Diatomite added during a filter run
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II! The term pH is determined by the concentration of: - Correct Answers Hydrogen ions
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II! Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: - Correct
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II! Answers Rise II! II! II! II!




When enough chlorine is added to cause complete oxidation of all organic compounds, a sudden drop in
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residual chlorine may be noticed. The point at which this occurs is called the: - Correct Answers Break-
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point



II! "Residual chlorine" refers to: - Correct Answers The amount left in the water after oxidation of organic
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II! material

, II! Which of the following is NOT considered a swimming pool disinfectant: - Correct Answers Chlorinated
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II! hydrocarbons



II! When chlorine is used as a disinfectant for swimming pools, the form in which it's disinfectant properties
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II! are the greatest is: - Correct Answers Hypochlorous acid
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II! The chemical most commonly used to raise pH is: - Correct Answers Sodium carbonate
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II! An example of a chemical used to stabilize chlorine is: - Correct Answers Cyanuric acid
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II! The chemical reagent recommended by the health department to test chlorine residual in swimming
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II! pools is: - Correct Answers D.P.D.II! II! II! II! II! II! II! II! II!




II! The chemical reagent used most often to test pH in swimming pools is: - Correct Answers Phenol red
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II! Considering all factors, which of the following would be the BEST range for pH in a swimming pool: -
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II! Correct Answers 7.2-7.8 II! II! II! II! II!




II! The minimum turnover rate to obtain 100% clarity in a pool is: - Correct Answers Once in eight hours
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II! There is a noticeable odor of chlorine around your pool and bathers are complaining of eye irritation.
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II! Which of the following is most likely to solve the problem: - Correct Answers Break point chlorination
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II! As pH increases, chlorine effectiveness: - Correct Answers Decreases
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II! In a high-rate sand filter system, the tanks are backwashed: - Correct Answers All at once
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II! The baffle in the filter tank is there to: - Correct Answers Disperse water evenly over the surface of the
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II! filter media II!