Pool Operator's Final Exam: Study Guide: Questions &
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
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is: - ANSWER:D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - ANSWER:Phenol red
Considering all factors, which of the following would be the BEST range for pH in a swimming pool: -
ANSWER:7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - ANSWER:Once in eight hours
There is a noticeable odor of chlorine around your pool and bathers are complaining of eye irritation.
Which of the following is most likely to solve the problem: - ANSWER:Break point chlorination
As pH increases, chlorine effectiveness: - ANSWER:Decreases
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
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is: - ANSWER:D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - ANSWER:Phenol red
Considering all factors, which of the following would be the BEST range for pH in a swimming pool: -
ANSWER:7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - ANSWER:Once in eight hours
There is a noticeable odor of chlorine around your pool and bathers are complaining of eye irritation.
Which of the following is most likely to solve the problem: - ANSWER:Break point chlorination
As pH increases, chlorine effectiveness: - ANSWER:Decreases
