POOL OPERATOR EXAM | QUESTIONS AND ANSWERS | VERIFIED
ANSWERS | LATEST EXAM
whole range chlorine in a pool: ____ to _____ - CORRECT ANSWER - 1, 5
ideal range chlorine in a pool: ____ to _____ - CORRECT ANSWER - 2, 4
whole range chlorine in a spa: ____ to _____ - CORRECT ANSWER - 2, 10
ideal range chlorine in a spa: ____ to _____ - CORRECT ANSWER - 3, 5
4 types of solid chlorine - CORRECT ANSWER - calcium hypochlorite,
lithium hypochlorite, trichlor, dichlor
liquid chlorine - CORRECT ANSWER - sodium hypochlorite (NaOCl)
how active is gas chlorine - CORRECT ANSWER - 100%
the active killing form of chlorine in water - CORRECT ANSWER -
hypochlorous acid (HOCl)
HOCl = ______ - CORRECT ANSWER - H+ (hydrogen ion) + OCl-
(hypochlorite ion)
most common granular chlorine (pH range) - CORRECT ANSWER - calcium
hypochlorite (8.5 - 11, used to super chlorinate water)
, not common form of chlorine due to low active strength (pH) - CORRECT
ANSWER - lithium hypochlorite (10.8)
tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) -
CORRECT ANSWER - trichlor (2.8 - 3.5, lower alkalinity and pH over time)
salt used as a disinfectant (pH) - CORRECT ANSWER - dichlor (6.7 -
common in vinyl lined pools)
most common type of chlorine used (pH) - CORRECT ANSWER - sodium
hypochlorite (NaOCl - 13)
______ needs special training to use and has a pH of ____ and will _____ when
added to water - CORRECT ANSWER - gas chlorine, 0, lower pH
chlorine is most effective as a pH of _____ - CORRECT ANSWER - 7.5
active disinfectant in the water - CORRECT ANSWER - free chlorine (FC)
FC is determined by the ______ test and is maintained between ____ and ____
ppm - CORRECT ANSWER - DPD, 2, 4
equal to the amount of hypochlorous acid (HOCl) and the amt of hypochlorite
ions (OCl-) - CORRECT ANSWER - free chlorine (fc)
the result of free chlorine reacting with organic compounds - CORRECT
ANSWER - combine chlorine (CC)
common name and max for pools and spas for combine chlorine - CORRECT
ANSWER - chloramines, 0.2, 0.5
ANSWERS | LATEST EXAM
whole range chlorine in a pool: ____ to _____ - CORRECT ANSWER - 1, 5
ideal range chlorine in a pool: ____ to _____ - CORRECT ANSWER - 2, 4
whole range chlorine in a spa: ____ to _____ - CORRECT ANSWER - 2, 10
ideal range chlorine in a spa: ____ to _____ - CORRECT ANSWER - 3, 5
4 types of solid chlorine - CORRECT ANSWER - calcium hypochlorite,
lithium hypochlorite, trichlor, dichlor
liquid chlorine - CORRECT ANSWER - sodium hypochlorite (NaOCl)
how active is gas chlorine - CORRECT ANSWER - 100%
the active killing form of chlorine in water - CORRECT ANSWER -
hypochlorous acid (HOCl)
HOCl = ______ - CORRECT ANSWER - H+ (hydrogen ion) + OCl-
(hypochlorite ion)
most common granular chlorine (pH range) - CORRECT ANSWER - calcium
hypochlorite (8.5 - 11, used to super chlorinate water)
, not common form of chlorine due to low active strength (pH) - CORRECT
ANSWER - lithium hypochlorite (10.8)
tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) -
CORRECT ANSWER - trichlor (2.8 - 3.5, lower alkalinity and pH over time)
salt used as a disinfectant (pH) - CORRECT ANSWER - dichlor (6.7 -
common in vinyl lined pools)
most common type of chlorine used (pH) - CORRECT ANSWER - sodium
hypochlorite (NaOCl - 13)
______ needs special training to use and has a pH of ____ and will _____ when
added to water - CORRECT ANSWER - gas chlorine, 0, lower pH
chlorine is most effective as a pH of _____ - CORRECT ANSWER - 7.5
active disinfectant in the water - CORRECT ANSWER - free chlorine (FC)
FC is determined by the ______ test and is maintained between ____ and ____
ppm - CORRECT ANSWER - DPD, 2, 4
equal to the amount of hypochlorous acid (HOCl) and the amt of hypochlorite
ions (OCl-) - CORRECT ANSWER - free chlorine (fc)
the result of free chlorine reacting with organic compounds - CORRECT
ANSWER - combine chlorine (CC)
common name and max for pools and spas for combine chlorine - CORRECT
ANSWER - chloramines, 0.2, 0.5
