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Pool Operator Exam Questions And Answers
100% Pass
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
4 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)
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most common granular chlorine (pH range) - ANS calcium hypochlorite (8.5 - 11, used to
super chlorinate water)
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)
Pool Operator Exam Questions And Answers
100% Pass
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
4 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)
, ©EVERLY 2025 ALL RIGHTS RESERVED
most common granular chlorine (pH range) - ANS calcium hypochlorite (8.5 - 11, used to
super chlorinate water)
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)
