Answers
5 factors generally figure into water balance - correct answer--
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PH, total alkalinity, calcium hardness, temperature, and total dissolved solids
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ACC or available chlorine content - correct answer--
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refers to relative sanitizing and oxidizing strength
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All public pools must have a ( ) and a () in order for the pool to open - correct answer--
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pool op and lifeguard
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Backwashing and why we do it - correct answer-- 7 7 7 7 7 7 7 7
The process of reversing the flow of water back through the filter media to remove the entra
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pped solids. 7
decrease in flow rate 7 7 7
excessive differential on the influent and effluent gauges
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bleaching out - correct answer-- 7 7 7 7
when the chorine/bromine reading is extremely high. Above 10 ppm
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blue green algae - correct answer--
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round slick spots that are extremely difficult to kill. this outer covering must be removed prio
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r to treating the algae. use steel bristles to brush.
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bromine - correct answer--last longer in hot water than chlorine
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after combining with ammonia it continues to disinfect
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cant be stabilized 7 7
CAC combined available chlorine - correct answer--
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is readily combined free available chlorine with ammonia and nitrogen compounds. This fo
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rmation is called chloramine. Chloramines are chlorine/ ammonia compounds. They are m
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ore stable than free chlorine but are not effective as a disinfectant.
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They cause irritation and an irritating odor.
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regulation for CAC is .2 (must be lower) and any higher will mean you have a stinky pool an
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d it must be tested when FAC is tested
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, calcium hardness - correct answer--
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the mineral content in the water and should be at around 150 - 400
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checked every week at a pool and everyday for a spa
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calcium hypochlorite - correct answer--
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long shelf life and is either dry granular or a tablet form.
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Certified pool operator has to be at a facilitiy ( ________________) prior to opening to mea
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sure, record and adjust... - correct answer--30 min
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children under what age should not use the spa - correct answer--13
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chlorine is the best disinfectant in the halogen family because it is the best -
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correct answer--oxidizer
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circular pool capacity - correct answer--diameter x diameter x average depth x 5.9
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corrosive water - correct answer-- 7 7 7 7
seeks to satisfy hunger by dissolving virtually everything that it contacts
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Cyanuric acid - correct answer-- 7 7 7 7
chemical used to stabilize an outdoor pool to protect chlorine against UV rays.
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range is 30 - 100 and must be tested every week for a pool
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employees have the right to know - correct answer--they may come in contact with blood
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may come in contact with dangerous chemicals
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personal protective equipment is provided
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given material safety data sheets
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erosion feeders - correct answer--
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enclosed apparatuses used to dispense disinfectants. water flows through the feeder erodi
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ng the solids inside and sending the disinfected water into the system
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FAC free available chlorine - correct answer--sum of HOCL and OCL-
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. It is the species that actually disinfects the water. The hypochlorite anion has very little oxi
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dizing potential and does not play a very big part in disinfecting the water
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DPD 12 7