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24 Cards in this Set
- Front
- Back
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Studies indicate that swimmers have a higher overall illness rate over non-swimmers
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Regardless of bathing water quality
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The treatment system of a pool is typically recommended to be installed in which of the following flow arrangements
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Skimmer or gutter line, main drain line, adjustment valves, hair stainer, filter aid pump, filters, disinfectant feeder, pH feeder, adjustable inlets
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Swimming pool water clarity is measured in terms of NTU or Nephelometer Turbitity Units. It is recommended that a level of .5 NTU
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Shall not be exceeded
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A swimming pool filtration system should filter the entire volume of water at a minimum of every
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6 hours
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The rate of filtration for a vacumm diatomite filter should be
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1-2 gpm/ft2
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Chemicals that have been used for pool disinfection include chorline, chloro-iso-cyanurates, bromine and
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Iodine
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Due to the large quantity of floating organisms and materials, the gutters or skimmers should receive what Minimum percent of the total pool water
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60%
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The recommended and most effective method of maintaining pool water quality is
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Continuous recirculation, chlorination and filtration
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One advantage of using cyanuric acid additive is that it
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Stabalizes residual chlorine
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The acidity-alkalinity balance affects eye irritation, water coagulation and the
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Effectiveness of chlorine
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The addition of sodium bicarbonate will
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Raise the pH
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To raise the pH add
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Soda ash
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To mix acid and water always
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Add acid to water
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When cholorine is added to water
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One acid is formed
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The best control of swimmer's itch at a bathing beach is to
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Add copper sulfate
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The preferred method for controlling sewage from watercraft is the use of
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On-board holding tanks
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Gas chlorine provides
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100% available cholorine
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The microbe primarly responsible for skin infections in whirlpools is
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Pseudomonas aeruginosa
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Water in childrens wading pools should be completely recirculated every
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60 minutes
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The ideal pH range for swimming pools is
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7.2-7.6
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The generally prohibited swimming facility from a public health perspective is a
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Fill and draw pool
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It is essential that all public pools
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Run the recirculation and disinfection equipment 24 hours per day
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The formula volume of pool/pump flow rat (GPM) X 60 min= Turnover rate will tell the
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Number of hours it takes for the entire contents of the pool to pass through the filters
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The main drain should have a grate that is how much larger than the area of the discharge pipe to prevent dangerous suction effects (absolute minimum)
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Four times
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