CPO Practice EXAM QUESTIONS & ANSWERS VERIFIED 100% CORRECT( A+ GRADED)

CPO Practice EXAM QUESTIONS & ANSWERS VERIFIED 100% CORRECT( A+ GRADED) How much sodium thiosulfate would you need to lower the free chlorine from 18 ppm to 2.0 ppm in a 150,000 gallon pool? (A) 35 lbs. (B) 30 lbs. (C) 25 lbs. (D) 39 lbs. -ANSWER -(D) 39 lbs. Evaporation heat losses from a pool are highest under which environmental condition? (A) High relative humidity (B) Low relative humidity (C) Clear sky (D) Low barometric pressure -ANSWER -(B) Low relative humidity The daily opening checklist should be used to: (A) Check the design of the facility (B) Ensure all safety equipment is in place (C) Check that all ground wires are properly connected (D) Ensure the heater is properly sized -ANSWER -(B) Ensure all safety equipment is in place 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. -ANSWER -(D) 24 lbs. Which chemical is sued to lower the pH value of pool or spa water? (A) Sodium bicarbonate (B) Fresh water (C) Sodium bisulfate (D) Calcium chloride -ANSWER -(C) Sodium bisulfate In a circulation system, the commonly accepted practice is to have: (A) 75% of the water return from the main drain (B) 50%of the water return via the main drain and 50% from the surface (C) 10% of the water return via the surface and 90% from the main drain (D) 75% of the water return from the surface -ANSWER -(D) 75% of the water return from the surface There is a diarrheal accident in 206,000 gallon pool. According to the CDC, the first step you should take to correctly handle this incident is: (A) Remove all the swimmers from the pool (B) Remove the excrement from the pool (C) Backwash the filters (D) add 20 lbs. sodium bicarbonate -ANSWER -(A) Remove all the swimmers from the pool If you have sand from your filter returning to the pool through the inlets, what is the likely cause? (A) Sand bed blocked (B) Broken filter laterals (C) Blocked filter laterals (D) Too frequent backwash cycle -ANSWER -(B) Broken filter laterals Which procedure is used to determine the level of combined chlorine in water? (A) Test for free chlorine and pH, then divide the pH number by the free chlorine number (B) Test for total chlorine and combined chlorine, then subtract the combined chlorine number from the total chlorine number (C) Test for free chlorine and total chlorine, then subtract the free chlorine number from the total chlorine number (D) Test for total alkalinity and pH, then multiply the total alkalinity number by the pH number -ANSWER -(C) Test for free chlorine and total chlorine, then subtract the free chlorine number from the total chlorine number You are the operator for a pool which is 75 feet long and 48 feet wide. The pool bottom has a constant slope which is 4 feet deep at the shallow end, and 6 feet deep at the deep end. What is the volume of this pool in gallons? (A) 135,000 gallons (B) 125,000 gallons (C) 145,000 gallons (D) 140,000 gallons -ANSWER -(A) 135,000 gallons 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 625 gmp. Using a filter media t=rate (fmr) of 12 gallons per minute, what size sand filter would you need to replace your damaged filter? (A) 50 sq. ft. (B) 36 sq. ft. (C) 38 sq. ft.