POOL OPERATOR'S FINAL EXAM
QUESTIONS AND ANSWERS RATED A+
2023/24
The percentage of hypoclorous acid formation is most influenced by: - pH
Pool painting is usually done: - Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must also use: - Soda Ash
The term "chlorine demand" refers to: - The amount of chlorine which will react with
substances in the pool
Re-circulation pumps used in swimming pools are the type called: - Centrifugal pumps
Reversing the flow of water through the filters is called: - Backwash
"Slurry feed" or "body feed" refers to: - Diatomite added during a filter run
The term pH is determined by the concentration of: - Hydrogen ions
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: -
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:
- Break-point
, "Residual chlorine" refers to: - The amount left in the water after oxidation of organic
material
Which of the following is NOT considered a swimming pool disinfectant: - Chlorinated
hydrocarbons
When chlorine is used as a disinfectant for swimming pools, the form in which it's
disinfectant properties are the greatest is: - Hypochlorous acid
The chemical most commonly used to raise pH is: - Sodium carbonate
An example of a chemical used to stabilize chlorine is: - Cyanuric acid
The chemical reagent recommended by the health department to test chlorine residual in
swimming pools is: - D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - Phenol red
Considering all factors, which of the following would be the BEST range for pH in a
swimming pool: - 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - 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: - Break point
chlorination
As pH increases, chlorine effectiveness: - Decreases
QUESTIONS AND ANSWERS RATED A+
2023/24
The percentage of hypoclorous acid formation is most influenced by: - pH
Pool painting is usually done: - Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must also use: - Soda Ash
The term "chlorine demand" refers to: - The amount of chlorine which will react with
substances in the pool
Re-circulation pumps used in swimming pools are the type called: - Centrifugal pumps
Reversing the flow of water through the filters is called: - Backwash
"Slurry feed" or "body feed" refers to: - Diatomite added during a filter run
The term pH is determined by the concentration of: - Hydrogen ions
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: -
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:
- Break-point
, "Residual chlorine" refers to: - The amount left in the water after oxidation of organic
material
Which of the following is NOT considered a swimming pool disinfectant: - Chlorinated
hydrocarbons
When chlorine is used as a disinfectant for swimming pools, the form in which it's
disinfectant properties are the greatest is: - Hypochlorous acid
The chemical most commonly used to raise pH is: - Sodium carbonate
An example of a chemical used to stabilize chlorine is: - Cyanuric acid
The chemical reagent recommended by the health department to test chlorine residual in
swimming pools is: - D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - Phenol red
Considering all factors, which of the following would be the BEST range for pH in a
swimming pool: - 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - 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: - Break point
chlorination
As pH increases, chlorine effectiveness: - Decreases
