Pool Operator Exam Rated A+

Pool Operator Exam Rated 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 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 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