Pool Operator Exam: Questions &
Answers
whole range chlorine in a pool: ____ to _____
(Ans- 1, 5
ideal range chlorine in a pool: ____ to _____
(Ans- 2, 4
whole range chlorine in a spa: ____ to _____
(Ans- 2, 10
ideal range chlorine in a spa: ____ to _____
(Ans- 3, 5
- types of solid chlorine
(Ans- calcium hypochlorite, lithium hypochlorite, trichlor, dichlor
liquid chlorine (Ans- sodium hypochlorite (NaOCl)
how active is gas chlorine (Ans- 100%
the active killing form of chlorine in water (Ans- hypochlorous acid (HOCl)
HOCl = ______ (Ans- H+ (hydrogen ion) + OCl- (hypochlorite ion)
most common granular chlorine (pH range) (Ans- calcium hypochlorite (8.5 - 11, used to super chlorinate water)
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not common form of chlorine due to low active strength (pH) (Ans- lithium hypochlorite (10.8)
tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) (Ans- trichlor (2.8 - 3.5, lower alkalinity and pH over time)
salt used as a disinfectant (pH) (Ans- dichlor (6.7 - common in vinyl lined pools)
most common type of chlorine used (pH) (Ans- sodium hypochlorite (NaOCl - 13)
______ needs special training to use and has a pH of ____ and will _____ when added to water (Ans- gas chlorine, 0, lower pH
chlorine is most effective as a pH of _____ (Ans- 7.5
active disinfectant in the water (Ans- free chlorine (FC)
FC is determined by the ______ test and is maintained between ____ and ____ ppm (Ans- DPD, 2, 4
equal to the amount of hypochlorous acid (HOCl) and the amt of hypochlorite ions (OCl-) (Ans- free chlorine (fc)
the result of free chlorine reacting with organic compounds (Ans- combine chlorine (CC)
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