POOL OPERATOR'S FINAL EXAM 70 QUESTIONS &
CORRECT ANSWERS LATEST 2025
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
CORRECT ANSWERS LATEST 2025
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
