Pool Operator's Final Exam Questions
and answers | Updated 2024/25 RATED
A+
The percentage of hypoclorous acid formation is most influenced by: -
II II II II II II II II II II pH
II II II
II Pool painting is usually done: -
II II II II II II II IIBefore opening in the spring II II II II
When a pool is chlorinated with gas chlorine, the operator must also use: -
II II II II II II II II II II II II II II II II II Soda
Ash
II
The term "chlorine demand" refers to: -
II II II II II II II II II II The amount of chlorine which will react with
II II II II II II II
substances in the pool
II II II II
Re-circulation pumps used in swimming pools are the type called: -
II II II II II II II II II II II II II II Centrifugal
pumps
II
II Reversing the flow of water through the filters is called: -
II II II II II II II II II II II II II Backwash
II "Slurry feed" or "body feed" refers to: -
II II II II II II II II II II Diatomite added during a filter run II II II II II
II The term pH is determined by the concentration of: -
II II II II II II II II II II II II Hydrogen ions II
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause
II II II II II II II II II II II
pH to: - Rise
II II II II II II
When enough chlorine is added to cause complete oxidation of all organic
II II II II II II II II II II II II
compounds, a sudden drop in residual chlorine may be noticed. The point at which
II II II II II II II II II II II II II II
this occurs is called the: - Break-point
II II II II II II II II II
"Residual chlorine" refers to: -
II II II II II II II II The amount left in the water after oxidation of
II II II II II II II II
organic material
II II
Which of the following is NOT considered a swimming pool disinfectant: -
II II II II II II II II II II II II II II
Chlorinated hydrocarbons
II II
When chlorine is used as a disinfectant for swimming pools, the form in which it's
II II II II II II II II II II II II II II II
disinfectant properties are the greatest is: - Hypochlorous acid
II II II II II II II II II II II
II The chemical most commonly used to raise pH is: -
II II II II II II II II II II II II Sodium carbonate II
II An example of a chemical used to stabilize chlorine is: -
II II II II II II II II II II II II II Cyanuric acid II
, The chemical reagent recommended by the health department to test chlorine
II II II II II II II II II II II
residual in swimming pools is: - D.P.D.
II II II II II II II II II
The chemical reagent used most often to test pH in swimming pools is: -
II II II II II II II II II II II II II II II II II Phenol
red
II
Considering all factors, which of the following would be the BEST range for pH in a
II II II II II II II II II II II II II II II II
swimming pool: - 7.2-7.8
II II II II II II
II The minimum turnover rate to obtain 100% clarity in a pool is: -
II II II II II II II II II II II II II II IIOnce in eight hours II II II
There is a noticeable odor of chlorine around your pool and bathers are complaining
II II II II II II II II II II II II II II
of eye irritation. Which of the following is most likely to solve the problem: - Break
II II II II II II II II II II II II II II II II II II
point chlorination
II II
II As pH increases, chlorine effectiveness: -
II II II II II II II II Decreases
II In a high-rate sand filter system, the tanks are backwashed: -
II II II II II II II II II II II II II All at once II II
The baffle in the filter tank is there to: -
II II II II II II II II II II II II II Disperse water evenly over the surface of II II II II II II
the filter media
II II II
An access manhole is constructed on each tank in sand and anthracite filter systems:
II II II II II II II II II II II II II II
- All of the above
II II II II II II II
II A hair and lint strainer should be located: -
II II II II II II II II II II II Before the pump and before the filter II II II II II II
Sodium hypochlorite used as a pool sanitizer also affects the water pH in the
II II II II II II II II II II II II II II
following manner: - Raises
II II II II II II
II Chlorine gas will ________ the pH: - II II II II II II II II II Lower
II DE systems should be turned off for a "rest": -
II II II II II II II II II II II II Never
If the filter run is started with clean filters, the difference between the influent and
II II II II II II II II II II II II II II II
effluent gauges should be: - Very little
II II II II II II II II II
II Glass containers are: - II II II II II II Never allowed in the pool enclosure
II II II II II
Which of the following factors would produce a greater consumption of disinfectant in
II II II II II II II II II II II II II
a pool: - Bather load plus sunlight
II II II II II II II II II
In a stabilized pool, the concentration of cyanuric acid should not exceed: -
II II II II II II II II II II II II II II II II 100
ppm
II
II Spa filtration and recirculation pumps should operate for: -
II II II II II II II II II II II 24 hours continuouslyII II
and answers | Updated 2024/25 RATED
A+
The percentage of hypoclorous acid formation is most influenced by: -
II II II II II II II II II II pH
II II II
II Pool painting is usually done: -
II II II II II II II IIBefore opening in the spring II II II II
When a pool is chlorinated with gas chlorine, the operator must also use: -
II II II II II II II II II II II II II II II II II Soda
Ash
II
The term "chlorine demand" refers to: -
II II II II II II II II II II The amount of chlorine which will react with
II II II II II II II
substances in the pool
II II II II
Re-circulation pumps used in swimming pools are the type called: -
II II II II II II II II II II II II II II Centrifugal
pumps
II
II Reversing the flow of water through the filters is called: -
II II II II II II II II II II II II II Backwash
II "Slurry feed" or "body feed" refers to: -
II II II II II II II II II II Diatomite added during a filter run II II II II II
II The term pH is determined by the concentration of: -
II II II II II II II II II II II II Hydrogen ions II
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause
II II II II II II II II II II II
pH to: - Rise
II II II II II II
When enough chlorine is added to cause complete oxidation of all organic
II II II II II II II II II II II II
compounds, a sudden drop in residual chlorine may be noticed. The point at which
II II II II II II II II II II II II II II
this occurs is called the: - Break-point
II II II II II II II II II
"Residual chlorine" refers to: -
II II II II II II II II The amount left in the water after oxidation of
II II II II II II II II
organic material
II II
Which of the following is NOT considered a swimming pool disinfectant: -
II II II II II II II II II II II II II II
Chlorinated hydrocarbons
II II
When chlorine is used as a disinfectant for swimming pools, the form in which it's
II II II II II II II II II II II II II II II
disinfectant properties are the greatest is: - Hypochlorous acid
II II II II II II II II II II II
II The chemical most commonly used to raise pH is: -
II II II II II II II II II II II II Sodium carbonate II
II An example of a chemical used to stabilize chlorine is: -
II II II II II II II II II II II II II Cyanuric acid II
, The chemical reagent recommended by the health department to test chlorine
II II II II II II II II II II II
residual in swimming pools is: - D.P.D.
II II II II II II II II II
The chemical reagent used most often to test pH in swimming pools is: -
II II II II II II II II II II II II II II II II II Phenol
red
II
Considering all factors, which of the following would be the BEST range for pH in a
II II II II II II II II II II II II II II II II
swimming pool: - 7.2-7.8
II II II II II II
II The minimum turnover rate to obtain 100% clarity in a pool is: -
II II II II II II II II II II II II II II IIOnce in eight hours II II II
There is a noticeable odor of chlorine around your pool and bathers are complaining
II II II II II II II II II II II II II II
of eye irritation. Which of the following is most likely to solve the problem: - Break
II II II II II II II II II II II II II II II II II II
point chlorination
II II
II As pH increases, chlorine effectiveness: -
II II II II II II II II Decreases
II In a high-rate sand filter system, the tanks are backwashed: -
II II II II II II II II II II II II II All at once II II
The baffle in the filter tank is there to: -
II II II II II II II II II II II II II Disperse water evenly over the surface of II II II II II II
the filter media
II II II
An access manhole is constructed on each tank in sand and anthracite filter systems:
II II II II II II II II II II II II II II
- All of the above
II II II II II II II
II A hair and lint strainer should be located: -
II II II II II II II II II II II Before the pump and before the filter II II II II II II
Sodium hypochlorite used as a pool sanitizer also affects the water pH in the
II II II II II II II II II II II II II II
following manner: - Raises
II II II II II II
II Chlorine gas will ________ the pH: - II II II II II II II II II Lower
II DE systems should be turned off for a "rest": -
II II II II II II II II II II II II Never
If the filter run is started with clean filters, the difference between the influent and
II II II II II II II II II II II II II II II
effluent gauges should be: - Very little
II II II II II II II II II
II Glass containers are: - II II II II II II Never allowed in the pool enclosure
II II II II II
Which of the following factors would produce a greater consumption of disinfectant in
II II II II II II II II II II II II II
a pool: - Bather load plus sunlight
II II II II II II II II II
In a stabilized pool, the concentration of cyanuric acid should not exceed: -
II II II II II II II II II II II II II II II II 100
ppm
II
II Spa filtration and recirculation pumps should operate for: -
II II II II II II II II II II II 24 hours continuouslyII II
