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