CPO Certified Pool Operator Exam Questions and Answers

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CPO Certified Pool Operator Exam
Questions and Answers


Erosion Feeder - correct-answer -chemical feed device, water passes through and
erodes the dry chemical




Free Chlorine - correct-answer -available chlorine, reacts to DPR powder for
testing




Hydrochloric Acid (HCL) - correct-answer -Also called Muriatic Acid, strong acid
used to reduce pH and Total Alkalinity




Influent - correct-answer -in flow of water to a pump, filter, pool




Oxidation Reduction Potential (ORP) - correct-answer -measures how effective the
chlorine is in the water, relates to the concentration of oxidizer




Parts Per Million (PPM) - correct-answer -measured in 1 million units

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pH - correct-answer -logarithm of the hydrogen-ion in the water




Saturation Index - correct-answer -calculation to predict if water has a tendency
to be corrosive




Sodium Hypochlorite (NaOCl) - correct-answer -Liquid bleach, liquid chlorine,
disenfectant, 10-15% available chlorine for pools, 5% for household use




Sodium Carbonate (Na2CO3) - correct-answer -white powder, raise pH and
alkalinity




Sodium Thiosulfate (Na2S2O3) - correct-answer -used to remove chlorine from
water




Superchlorination - correct-answer -adding large amount of chlorine to water to
destroy