QUESTIONS AND ANSWERS FOR CPO TEST EXAM 2023 EDITION A+ GRADED

QUESTIONS AND ANSWERS FOR CPO TEST EXAM 2023 EDITION A+ GRADED to lower pH add: - CORRECT ANSWER-muriatic acid carbon dioxide to increase pH add: - CORRECT ANSWER-sodium carbonate sodium hydroxide sodium sesquicarbonate the acceptable pH range is: a) 6.8-7.0 b) 7.2-7.8 c) 7.0-7.4 d) none of the above - CORRECT ANSWER-b) 7.2-7.8 the ideal pH range is: a) 7.4-7.6 b) 7.8-8.0 c) 6.8-7.4 - CORRECT ANSWER-a) 7.4-7.6 free chlorine is a(n): a) oxidizer b) stabilizer c) active disinfectant - CORRECT ANSWER-c) active disinfectant it is common practice to maintain free chlorine at: a) 1.0-2.0 ppm b) 2.0-4.0 ppm c) 5.0-7.0 ppm - CORRECT ANSWER-b) 2.0-4.0 ppm what is the maximum free chlorine that should be used? a) 6.0 ppm b) 1.0 ppm c) 5.0 ppm - CORRECT ANSWER-c) 5.0 ppm combined chlorine is NOT an effective: a) oxidizer b) stabilizer c) disinfectant - CORRECT ANSWER-c) disinfectant hypochlorous acid is a(n): a) oxidizer b) stabilizer c) disinfectant d) both A and C - CORRECT ANSWER-d) both A and C the maximum combined chlorine allowed in a pool is: a) 0.5 ppm b) 0.7 ppm c) 0.1 ppm d) 0.2 ppm - CORRECT ANSWER-d) 0.2 ppm available chlorine content is a comparison of the relative amount of ________ released into water for different disinfectants. - CORRECT ANSWER-chlorine active chlorine percentage is the percentage by _________ of technical grade active ingredient in the product. - CORRECT ANSWER-weight name the unstabilized chlorines/disinfectants - CORRECT ANSWER-sodium hypochlorite calcium hypochlorite lithium hypochlorite chlorine gas name the stabilized disinfectants - CORRECT ANSWER-trichlor dichlor the CyA level should be maintained between: a) 30 and 50 ppm b) 50 and 100 ppm c) 10 and 20 ppm d) 10 and 40 ppm - CORRECT ANSWER-a) 30 and 50 ppm CyA is typically used to: - CORRECT ANSWER-protect chlorine from the effects of UV light and sunlight what is the most common method of reducing CyA concentration? - CORRECT ANSWER-partially drain and replace water with fresh, potable water CyA stabilized free chlorine but NOT: a) hypochlorite b) carbonate c) bromine - CORRECT ANSWER-c) bromine hypochlorous acid is a(n): a) stabilizer b) oxidizer c) disinfectant d) both B and C - CORRECT ANSWER-d) both B and C when free chlorine reacts with ammonia, ___________ chloramines form. - CORRECT ANSWER-inorganic when free chlorine reacts with organic contaminants, ___________ chloramines form - CORRECT ANSWER-organic inorganic contaminants do NOT contain: a) oxygen b) carbon c) chlorine d) algae - CORRECT ANSWER-b) carbon what is the most common disinfectant? - CORRECT ANSWER-sodium hypochlorite what is commonly used to superchlorinate water? - CORRECT ANSWER-calcium hypochlorite CyA is typically used to protect chlorine from the effects of: - CORRECT ANSWER-UV light and sunlight bromine is a(n): a) oxidizer b) disinfectant c) stabilizer d) both A and B - CORRECT ANSWER-d) both A and B name the secondary disinfectants. - CORRECT ANSWER-ozone UV light chlorine dioxide PHMB factors that contribute to the balance of water are: - CORRECT ANSWER-pH total alkalinity calcium hardness temperature TDS corrosive water means the pH could be too ______. - CORRECT ANSWER-low scaling water means the pH could be too _______. - CORRECT ANSWER-high total alkalinity is made up of - CORRECT ANSWER-bicarbonate carbonate