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Pool Operator's Final Exam Questions
and Answers Latest 2026
The percentage of hypoclorous acid formation is most
influenced by: Ans: pH
Pool painting is usually done: Ans: Before opening in the
spring
When a pool is chlorinated with gas chlorine, the
operator must also use: Ans: Soda Ash
The term "chlorine demand" refers to: Ans: The amount
of chlorine which will react with substances in the pool
Re-circulation pumps used in swimming pools are the
type called: Ans: Centrifugal pumps
Reversing the flow of water through the filters is called:
Ans: Backwash
"Slurry feed" or "body feed" refers to: Ans: Diatomite
added during a filter run
The term pH is determined by the concentration of: Ans:
Hydrogen ions
Because carbonate ions combine with hydrogen ions,
sodium carbonate will cause pH to: Ans: Rise
© 2025 All rights reserved
, 2 | Page
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: Ans: Break-point
"Residual chlorine" refers to: Ans: The amount left in the
water after oxidation of organic material
Which of the following is NOT considered a swimming
pool disinfectant: Ans: Chlorinated hydrocarbons
When chlorine is used as a disinfectant for swimming
pools, the form in which it's disinfectant properties are
the greatest is: Ans: Hypochlorous acid
The chemical most commonly used to raise pH is: Ans:
Sodium carbonate
An example of a chemical used to stabilize chlorine is:
Ans: Cyanuric acid
The chemical reagent recommended by the health
department to test chlorine residual in swimming pools
is: Ans: D.P.D.
The chemical reagent used most often to test pH in
swimming pools is: Ans: Phenol red
Considering all factors, which of the following would be
the BEST range for pH in a swimming pool: Ans: 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a
pool is: Ans: Once in eight hours
© 2025 All rights reserved
Pool Operator's Final Exam Questions
and Answers Latest 2026
The percentage of hypoclorous acid formation is most
influenced by: Ans: pH
Pool painting is usually done: Ans: Before opening in the
spring
When a pool is chlorinated with gas chlorine, the
operator must also use: Ans: Soda Ash
The term "chlorine demand" refers to: Ans: The amount
of chlorine which will react with substances in the pool
Re-circulation pumps used in swimming pools are the
type called: Ans: Centrifugal pumps
Reversing the flow of water through the filters is called:
Ans: Backwash
"Slurry feed" or "body feed" refers to: Ans: Diatomite
added during a filter run
The term pH is determined by the concentration of: Ans:
Hydrogen ions
Because carbonate ions combine with hydrogen ions,
sodium carbonate will cause pH to: Ans: Rise
© 2025 All rights reserved
, 2 | Page
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: Ans: Break-point
"Residual chlorine" refers to: Ans: The amount left in the
water after oxidation of organic material
Which of the following is NOT considered a swimming
pool disinfectant: Ans: Chlorinated hydrocarbons
When chlorine is used as a disinfectant for swimming
pools, the form in which it's disinfectant properties are
the greatest is: Ans: Hypochlorous acid
The chemical most commonly used to raise pH is: Ans:
Sodium carbonate
An example of a chemical used to stabilize chlorine is:
Ans: Cyanuric acid
The chemical reagent recommended by the health
department to test chlorine residual in swimming pools
is: Ans: D.P.D.
The chemical reagent used most often to test pH in
swimming pools is: Ans: Phenol red
Considering all factors, which of the following would be
the BEST range for pH in a swimming pool: Ans: 7.2-7.8
The minimum turnover rate to obtain 100% clarity in a
pool is: Ans: Once in eight hours
© 2025 All rights reserved
