Cpo Practice Exam - Questions And Answers

To be classified as a disinfectant, a chemical must kill or inactivate 99.99% of contaminates and: (A) Maintain proper water balance (B) Be biodegradable (C) Leave a measurable residual in the water (D) Have a sweet smelling aroma {Ans: (C) Leave a measurable residual in the water}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.}Ferrous ammonium sulfate (FAS-DPD) is what kind of test method? (A) Colorimetric (B) Turbidimetric (C) Electronic (D) Titrimetric {Ans: (D) Titrimetric}Oxidation Reduction Potential testing (ORP) is measured in: (A) Parts per million (ppm) (B) Millivolts (mV) (C) Gallons per minute (gpm) (D) Free available chlorine (FAC) {Ans: (B) Millivolts (mV)}In pre coating a vacuum D.E. filter, what is the standard addition rate per 10 ft. sq. of filter surface area? (A) 2 to 3 lbs. (B) 5 lbs. (C) 1 to 1.5 lbs. (D) 5 to 10 lbs. {Ans: (C) 1 to 1.5 lbs.}Which chemical is used to raise the total alkalinity level? (A) Sodium