POOL AND HOT TUB CPO PRACTICE 2023 QUESTIONS AND ANSWERS GRADED AND ALREADY PASSED

You are the operator for a pool which is 164 feet long and 80 feet wide. The pool bottom has a constant slope which is 4 feet deep at the shallow end, and 10 feet deep at the deep end. What is the volume of this pool in gallons? - CORRECT ANS f You operate a pool which uses high rate sand filters. You discover that your filter tank has developed a major leak and must be replaced. Your pool operates with a flow rate of 525 GPM. Using a filter media rate (fmr) of 15 gallons per minute, what size sand filter would you need to replace your damaged filter? - CORRECT ANS fdsd Which chemical is used to lower the pH value of pool or spa water? - CORRECT ANS You have a 25,000 gallon hotel pool with a calcium hardness level of 170 ppm. How much calcium chloride (77%) would be required to increase this to 250 PPM? - CORRECT ANS The daily opening checklist should be used to: - CORRECT ANS Evaporation heat losses from a pool are highest under which environmental condition? - CORRECT ANS How much sodium thiosulfate would you need to lower the free chlorine from 18 ppm to 2.0 ppm in an 150,000 gallon pool? - CORRECT ANS When should you backwash high rate sand filters that have a single pressure gauge? - CORRECT ANS Oxidation Reduction Potential testing (ORP) is measured in: - CORRECT ANS The reagent commonly used to test pH is: - CORRECT ANS What condition mandates an immediate closure of your swimming pool? - CORRECT ANS When mechanical cooling is used on an indoor therapeutic pool facility, the recommended ASHRAE fresh air exchange rate should be: - CORRECT ANS The Occupational Safety and Health Administration (OSHA) requires aquatic facilities to maintain: - CORRECT ANS An erosion chemical feeder is what type of feeder? - CORRECT ANS Cyanuric acid (stabilizer) protects free chlorine (FC) against effects of: - CORRECT ANS Which type of filter requires the least amount of water to clean? - CORRECT ANS What is the likely result if the alkalinity of the pool water is greater than 180 ppm? - CORRECT ANS To be classified as a disinfectant, a chemical must kill or inactivate 99.99% of contaminants and: - CORRECT ANS Which chlorine type tends to lower the pH level in water? - CORRECT ANS The vacuum gauge is installed: - CORRECT ANS Cloudy or murky green-tinted pool water is usually an indication of: - CORRECT ANS To reduce the possibility of suction entrapment an operator should: - CORRECT ANS At your swimming pool, failure to provide the appropriate standard of care to the public can lead to a case of: - CORRECT ANS Which chemical could be added to lower the chlorine level of the water? - CORRECT ANS