Cpo Practice Exam Questions & Answers 2024 ( A+ Graded 100% Verified)

Which filter media would not require a dust mask when handling and storing? (A) Silica sand (B) Cartridge (C) Diatomaceous earth (D) Zeolite {Ans: (B) Cartridge}When should you backwash high rate sand filters that have a single pressure gauge? (A) After an 8 to 10 psi increase above starting pressure (B) Every 2 days (C) Once per week (D) When the influent and effluent gauges are 10 to 20 psi apart {Ans: (A) After an 8 to 10 psi increase above starting pressure}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? (A) 20 lbs. (B) 25 lbs. (C) 18 lbs. (D) 24 lbs. {Ans: (D) 24 lbs.}Cyanuric acid (stabilizer) protects free chlorine (FC) against the effects of: (A) Pathogens like Crypto, Giardia, and Shigella (B) High Total dissolved solids (C) Ultraviolet rays from the sun (D) High PH {Ans: (C) Ultraviolet rays from the sun}The vacuum gauge is installed: (A) After the pump but before the filter (B) After the filter and the heater (C) In the return line after all of the equipment (D) Before