Pool Operator's Final Exam Questions
& Answers
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
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 its 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
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: - ANS ✔ - Break point chlorination
As pH increases, chlorine effectiveness: - ANS ✔ - Decreases
In a high-rate sand filter system, the tanks are backwashed: - ANS ✔ - All at once
The baffle in the filter tank is there to: - ANS ✔ - Disperse water evenly over the surface of the filter
media
& Answers
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
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 its 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
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: - ANS ✔ - Break point chlorination
As pH increases, chlorine effectiveness: - ANS ✔ - Decreases
In a high-rate sand filter system, the tanks are backwashed: - ANS ✔ - All at once
The baffle in the filter tank is there to: - ANS ✔ - Disperse water evenly over the surface of the filter
media
