Pool Operator's Final Exam with verified detailed solutions
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The percentage of hypoclorous acid formation is most influenced by: - correct
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answer✔✔pH
Pool painting is usually done: - correct answer✔✔Before opening in the spring
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When a pool is chlorinated with gas chlorine, the operator must also use: - correct
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answer✔✔Soda Ash ||
The term "chlorine demand" refers to: - correct answer✔✔The amount of chlorine which
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will react with substances in the pool
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Re-circulation pumps used in swimming pools are the type called: - correct
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answer✔✔Centrifugal pumps ||
Reversing the flow of water through the filters is called: - correct answer✔✔Backwash
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"Slurry feed" or "body feed" refers to: - correct answer✔✔Diatomite added during a filter
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run
The term pH is determined by the concentration of: - correct answer✔✔Hydrogen ions
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Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: -
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correct answer✔✔Rise ||
, When enough chlorine is added to cause complete oxidation of all organic compounds, a
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sudden drop in residual chlorine may be noticed. The point at which this occurs is called
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the: - correct answer✔✔Break-point
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"Residual chlorine" refers to: - correct answer✔✔The amount left in the water after
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oxidation of organic material || || ||
Which of the following is NOT considered a swimming pool disinfectant: - correct
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answer✔✔Chlorinated hydrocarbons ||
When chlorine is used as a disinfectant for swimming pools, the form in which it's
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disinfectant properties are the greatest is: - correct answer✔✔Hypochlorous acid
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The chemical most commonly used to raise pH is: - correct answer✔✔Sodium carbonate
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An example of a chemical used to stabilize chlorine is: - correct answer✔✔Cyanuric acid
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The chemical reagent recommended by the health department to test chlorine residual in
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swimming pools is: - correct answer✔✔D.P.D.
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The chemical reagent used most often to test pH in swimming pools is: - correct
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answer✔✔Phenol red ||
Considering all factors, which of the following would be the BEST range for pH in a
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swimming pool: - correct answer✔✔7.2-7.8
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The minimum turnover rate to obtain 100% clarity in a pool is: - correct answer✔✔Once in
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eight hours ||
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The percentage of hypoclorous acid formation is most influenced by: - correct
|| || || || || || || || || || || ||
answer✔✔pH
Pool painting is usually done: - correct answer✔✔Before opening in the spring
|| || || || || || || || || || ||
When a pool is chlorinated with gas chlorine, the operator must also use: - correct
|| || || || || || || || || || || || || || ||
answer✔✔Soda Ash ||
The term "chlorine demand" refers to: - correct answer✔✔The amount of chlorine which
|| || || || || || || || || || || || ||
will react with substances in the pool
|| || || || || ||
Re-circulation pumps used in swimming pools are the type called: - correct
|| || || || || || || || || || || ||
answer✔✔Centrifugal pumps ||
Reversing the flow of water through the filters is called: - correct answer✔✔Backwash
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"Slurry feed" or "body feed" refers to: - correct answer✔✔Diatomite added during a filter
|| || || || || || || || || || || || || ||
run
The term pH is determined by the concentration of: - correct answer✔✔Hydrogen ions
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Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: -
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correct answer✔✔Rise ||
, When enough chlorine is added to cause complete oxidation of all organic compounds, a
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sudden drop in residual chlorine may be noticed. The point at which this occurs is called
|| || || || || || || || || || || || || || || ||
the: - correct answer✔✔Break-point
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"Residual chlorine" refers to: - correct answer✔✔The amount left in the water after
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oxidation of organic material || || ||
Which of the following is NOT considered a swimming pool disinfectant: - correct
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answer✔✔Chlorinated hydrocarbons ||
When chlorine is used as a disinfectant for swimming pools, the form in which it's
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disinfectant properties are the greatest is: - correct answer✔✔Hypochlorous acid
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The chemical most commonly used to raise pH is: - correct answer✔✔Sodium carbonate
|| || || || || || || || || || || ||
An example of a chemical used to stabilize chlorine is: - correct answer✔✔Cyanuric acid
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The chemical reagent recommended by the health department to test chlorine residual in
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swimming pools is: - correct answer✔✔D.P.D.
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The chemical reagent used most often to test pH in swimming pools is: - correct
|| || || || || || || || || || || || || || ||
answer✔✔Phenol red ||
Considering all factors, which of the following would be the BEST range for pH in a
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swimming pool: - correct answer✔✔7.2-7.8
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The minimum turnover rate to obtain 100% clarity in a pool is: - correct answer✔✔Once in
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eight hours ||
