Pool Operator's Final Exam/77 Questions
with correct Answers.
The percentage of hypoclorous acid formation is most influenced by: - -pH
-Pool painting is usually done: - -Before opening in the spring
-When a pool is chlorinated with gas chlorine, the operator must also use: - -Soda Ash
-The term "chlorine demand" refers to: - -The amount of chlorine which will react with
substances in the pool
-Re-circulation pumps used in swimming pools are the type called: - -Centrifugal
pumps
-Reversing the flow of water through the filters is called: - -Backwash
-"Slurry feed" or "body feed" refers to: - -Diatomite added during a filter run
-The term pH is determined by the concentration of: - -Hydrogen ions
-Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH
to: - -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: - -Break-point
-"Residual chlorine" refers to: - -The amount left in the water after oxidation of organic
material
-Which of the following is NOT considered a swimming pool disinfectant: - -
Chlorinated hydrocarbons
-When chlorine is used as a disinfectant for swimming pools, the form in which it's
disinfectant properties are the greatest is: - -Hypochlorous acid
-The chemical most commonly used to raise pH is: - -Sodium carbonate
-An example of a chemical used to stabilize chlorine is: - -Cyanuric acid
-The chemical reagent recommended by the health department to test chlorine residual
in swimming pools is: - -D.P.D.
-The chemical reagent used most often to test pH in swimming pools is: - -Phenol red
, -Considering all factors, which of the following would be the BEST range for pH in a
swimming pool: - -7.2-7.8
-The minimum turnover rate to obtain 100% clarity in a pool is: - -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: - -Break point
chlorination
-As pH increases, chlorine effectiveness: - -Decreases
-In a high-rate sand filter system, the tanks are backwashed: - -All at once
-The baffle in the filter tank is there to: - -Disperse water evenly over the surface of the
filter media
-An access manhole is constructed on each tank in sand and anthracite filter systems: -
-All of the above
-A hair and lint strainer should be located: - -Before the pump and before the filter
-Sodium hypochlorite used as a pool sanitizer also affects the water pH in the following
manner: - -Raises
-Chlorine gas will ________ the pH: - -Lower
-DE systems should be turned off for a "rest": - -Never
-If the filter run is started with clean filters, the difference between the influent and
effluent gauges should be: - -Very little
-Glass containers are: - -Never allowed in the pool enclosure
-Which of the following factors would produce a greater consumption of disinfectant in
a pool: - -Bather load plus sunlight
-In a stabilized pool, the concentration of cyanuric acid should not exceed: - -100 ppm
-Spa filtration and recirculation pumps should operate for: - -24 hours continuously
-NSPF recommends that accident reports be kept for a period of: - -3 Years
-Which of the following is NOT a basic part of a swimming pool filter system: - -
Chlorinator
-Pool closure is the responsibility of: - -Both the pool operator/owner and the Health
Department
with correct Answers.
The percentage of hypoclorous acid formation is most influenced by: - -pH
-Pool painting is usually done: - -Before opening in the spring
-When a pool is chlorinated with gas chlorine, the operator must also use: - -Soda Ash
-The term "chlorine demand" refers to: - -The amount of chlorine which will react with
substances in the pool
-Re-circulation pumps used in swimming pools are the type called: - -Centrifugal
pumps
-Reversing the flow of water through the filters is called: - -Backwash
-"Slurry feed" or "body feed" refers to: - -Diatomite added during a filter run
-The term pH is determined by the concentration of: - -Hydrogen ions
-Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH
to: - -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: - -Break-point
-"Residual chlorine" refers to: - -The amount left in the water after oxidation of organic
material
-Which of the following is NOT considered a swimming pool disinfectant: - -
Chlorinated hydrocarbons
-When chlorine is used as a disinfectant for swimming pools, the form in which it's
disinfectant properties are the greatest is: - -Hypochlorous acid
-The chemical most commonly used to raise pH is: - -Sodium carbonate
-An example of a chemical used to stabilize chlorine is: - -Cyanuric acid
-The chemical reagent recommended by the health department to test chlorine residual
in swimming pools is: - -D.P.D.
-The chemical reagent used most often to test pH in swimming pools is: - -Phenol red
, -Considering all factors, which of the following would be the BEST range for pH in a
swimming pool: - -7.2-7.8
-The minimum turnover rate to obtain 100% clarity in a pool is: - -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: - -Break point
chlorination
-As pH increases, chlorine effectiveness: - -Decreases
-In a high-rate sand filter system, the tanks are backwashed: - -All at once
-The baffle in the filter tank is there to: - -Disperse water evenly over the surface of the
filter media
-An access manhole is constructed on each tank in sand and anthracite filter systems: -
-All of the above
-A hair and lint strainer should be located: - -Before the pump and before the filter
-Sodium hypochlorite used as a pool sanitizer also affects the water pH in the following
manner: - -Raises
-Chlorine gas will ________ the pH: - -Lower
-DE systems should be turned off for a "rest": - -Never
-If the filter run is started with clean filters, the difference between the influent and
effluent gauges should be: - -Very little
-Glass containers are: - -Never allowed in the pool enclosure
-Which of the following factors would produce a greater consumption of disinfectant in
a pool: - -Bather load plus sunlight
-In a stabilized pool, the concentration of cyanuric acid should not exceed: - -100 ppm
-Spa filtration and recirculation pumps should operate for: - -24 hours continuously
-NSPF recommends that accident reports be kept for a period of: - -3 Years
-Which of the following is NOT a basic part of a swimming pool filter system: - -
Chlorinator
-Pool closure is the responsibility of: - -Both the pool operator/owner and the Health
Department
