Pool Operator's Final Exam
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 Which of the following factors would
produce a greater consumption of disinfectant in a pool: -(correct answer)Bather load plus
sunlight In a stabilized pool, the concentration of cyanuric acid should not exceed: -(correct
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 Which of the following factors would
produce a greater consumption of disinfectant in a pool: -(correct answer)Bather load plus
sunlight In a stabilized pool, the concentration of cyanuric acid should not exceed: -(correct
