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