POOL OPERATOR'S FINAL EXAM CORRECT QUESTIONS AND ANSWERS
The percentage of hypoclorous acid formation is most influenced by: - correct answers-pH
Pool painting is usually done: - correct answers-Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must also use: - correct answers-Soda Ash
The term "chlorine demand" refers to: - correct answers-The amount of chlorine which will react with
substances in the pool
Re-circulation pumps used in swimming pools are the type called: - correct answers-Centrifugal pumps
Reversing the flow of water through the filters is called: - correct answers-Backwash
"Slurry feed" or "body feed" refers to: - correct answers-Diatomite added during a filter run
The term pH is determined by the concentration of: - correct answers-Hydrogen ions
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: - correct
answers-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 answers-Break-
point
"Residual chlorine" refers to: - correct answers-The amount left in the water after oxidation of organic
material
Which of the following is NOT considered a swimming pool disinfectant: - correct answers-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 answers-Hypochlorous acid
The chemical most commonly used to raise pH is: - correct answers-Sodium carbonate
An example of a chemical used to stabilize chlorine is: - correct answers-Cyanuric acid
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is: - correct answers-D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - correct answers-Phenol red
Considering all factors, which of the following would be the BEST range for pH in a swimming pool: -
correct answers-7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - correct answers-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: - correct answers-Break point chlorination
As pH increases, chlorine effectiveness: - correct answers-Decreases
In a high-rate sand filter system, the tanks are backwashed: - correct answers-All at once
The baffle in the filter tank is there to: - correct answers-Disperse water evenly over the surface of the
filter media
An access manhole is constructed on each tank in sand and anthracite filter systems: - correct answers-
All of the above
The percentage of hypoclorous acid formation is most influenced by: - correct answers-pH
Pool painting is usually done: - correct answers-Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must also use: - correct answers-Soda Ash
The term "chlorine demand" refers to: - correct answers-The amount of chlorine which will react with
substances in the pool
Re-circulation pumps used in swimming pools are the type called: - correct answers-Centrifugal pumps
Reversing the flow of water through the filters is called: - correct answers-Backwash
"Slurry feed" or "body feed" refers to: - correct answers-Diatomite added during a filter run
The term pH is determined by the concentration of: - correct answers-Hydrogen ions
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: - correct
answers-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 answers-Break-
point
"Residual chlorine" refers to: - correct answers-The amount left in the water after oxidation of organic
material
Which of the following is NOT considered a swimming pool disinfectant: - correct answers-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 answers-Hypochlorous acid
The chemical most commonly used to raise pH is: - correct answers-Sodium carbonate
An example of a chemical used to stabilize chlorine is: - correct answers-Cyanuric acid
The chemical reagent recommended by the health department to test chlorine residual in swimming
pools is: - correct answers-D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - correct answers-Phenol red
Considering all factors, which of the following would be the BEST range for pH in a swimming pool: -
correct answers-7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - correct answers-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: - correct answers-Break point chlorination
As pH increases, chlorine effectiveness: - correct answers-Decreases
In a high-rate sand filter system, the tanks are backwashed: - correct answers-All at once
The baffle in the filter tank is there to: - correct answers-Disperse water evenly over the surface of the
filter media
An access manhole is constructed on each tank in sand and anthracite filter systems: - correct answers-
All of the above
