Pool Operator Exam Questions and Answers with complete solution

whole range chlorine in a pool: ____ to _____ - Answer-1, 5 ideal range chlorine in a pool: ____ to _____ - Answer-2, 4 whole range chlorine in a spa: ____ to _____ - Answer-2, 10 ideal range chlorine in a spa: ____ to _____ - Answer-3, 5 4 types of solid chlorine - Answer-calcium hypochlorite, lithium hypochlorite, trichlor, dichlor liquid chlorine - Answer-sodium hypochlorite (NaOCl) how active is gas chlorine - Answer-100% the active killing form of chlorine in water - Answer-hypochlorous acid (HOCl) HOCl = ______ - Answer-H+ (hydrogen ion) + OCl- (hypochlorite ion) most common granular chlorine (pH range) - Answer-calcium hypochlorite (8.5 - 11, used to super chlorinate water) not common form of chlorine due to low active strength (pH) - Answer-lithium hypochlorite (10.8) tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) - Answer-trichlor (2.8 - 3.5, lower alkalinity and pH over time) salt used as a disinfectant (pH) - Answer-dichlor (6.7 - common in vinyl lined pools)most common type of chlorine used (pH) - Answer-sodium hypochlorite (NaOCl - 13) ______ needs special training to use and has a pH of ____ and will _____ when added to water - Answer-gas chlorine, 0, lower pH chlorine is most effective as a pH of _____ - Answer-7.5 active disinfectant in the water - Answer-free chlorine (FC)