Pool Operator's Final Exam Questions With
Correct Detailed Answers.
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
