Pool Operator's Final Exam questions and
answers 2024\2025 A+ Grade
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
"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
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to:
- correct 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:
- correct answer Break-point
"Residual chlorine" refers to:
- correct answer The amount left in the water after oxidation of organic material
Which of the following is NOT considered a swimming pool disinfectant:
- correct 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:
- correct answer Hypochlorous acid
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
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is:
- correct answer D.P.D.
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 swimming pool:
- correct answer 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is:
- correct answer Once in eight hours
answers 2024\2025 A+ Grade
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
"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
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to:
- correct 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:
- correct answer Break-point
"Residual chlorine" refers to:
- correct answer The amount left in the water after oxidation of organic material
Which of the following is NOT considered a swimming pool disinfectant:
- correct 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:
- correct answer Hypochlorous acid
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
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is:
- correct answer D.P.D.
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 swimming pool:
- correct answer 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is:
- correct answer Once in eight hours
