Pool Operator Exam|Latest Update Graded A+
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
c...
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
how much CC should a pool have ideally
zero
shocking the pool is also called
breakpoint chlorination
breakpoint chlorination is the conversion of ________ into ______
combine chlorine, nitrogen gas
breakpoint chlorination equation
BPC = 10 x CC [BPC = 10 x (TC - FC)]
whole cyanuric acid range: _____ to ______ppm
0, 100
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