Pool Operator's Final Exam Questions And Answers.
The percentage of hypoclorous acid formation is most influenced by: - correct answer.pH
Pool painting is usually done: - correct answer.Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must als...
The percentage of hypoclorous acid formation is most influenced by: - correct
answer.pH
Pool painting is usually done: - correct answer.Before opening in the spring
When a pool is chlorinated with gas chlorine, the operator must also use: - correct
answer.Soda Ash
The term "chlorine demand" refers to: - correct answer.The amount of chlorine which
will react with substances in the pool
Re-circulation pumps used in swimming pools are the type called: - correct
answer.Centrifugal pumps
Reversing the flow of water through the filters is called: - correct answer.Backwash
"Slurry feed" or "body feed" refers to: - correct answer.Diatomite added during a filter
run
The term pH is determined by the concentration of: - correct answer.Hydrogen ions
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH
to: - correct 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: - correct answer.Break-point
"Residual chlorine" refers to: - correct answer.The amount left in the water after
oxidation of organic material
Which of the following is NOT considered a swimming pool disinfectant: - correct
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: - correct answer.Hypochlorous acid
The chemical most commonly used to raise pH is: - correct answer.Sodium carbonate
, An example of a chemical used to stabilize chlorine is: - correct answer.Cyanuric acid
The chemical reagent recommended by the health department to test chlorine residual
in swimming pools is: - correct answer.D.P.D.
The chemical reagent used most often to test pH in swimming pools is: - correct
answer.Phenol red
Considering all factors, which of the following would be the BEST range for pH in a
swimming pool: - correct answer.7.2-7.8
The minimum turnover rate to obtain 100% clarity in a pool is: - correct answer.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
answer.Break point chlorination
As pH increases, chlorine effectiveness: - correct answer.Decreases
In a high-rate sand filter system, the tanks are backwashed: - correct answer.All at
once
The baffle in the filter tank is there to: - correct answer.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 answer.All of the above
A hair and lint strainer should be located: - correct answer.Before the pump and before
the filter
Sodium hypochlorite used as a pool sanitizer also affects the water pH in the following
manner: - correct answer.Raises
Chlorine gas will ________ the pH: - correct answer.Lower
DE systems should be turned off for a "rest": - correct answer.Never
If the filter run is started with clean filters, the difference between the influent and
effluent gauges should be: - correct answer.Very little
Glass containers are: - correct answer.Never allowed in the pool enclosure
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