Aquatic Facility Operator Exam Questions and Answers

What is NOT one of the AFO's primary responsibilities? Teaching Lessons What should you do every day as a part of your AFO safety duty program? Facility Inspection How many gallons of water is in one cubic ft? approximately 7.5 How do you calculate how many gallons are in a pool? 1. calculate the volume (LxW)xDavg 2. multiple by 7.5 gallons Law of Dilution During a turnover less than half of the water molecules pass through the filter What kind of pools need a higher turnover? Special pools When do gutters NOT work? when flooded What do surge pits need? room to contain surge flow What do modulating float valves regulate? the amount of water contributed by the bottom outlet by slowly restricting the bottom drain valve as the water level in the surge pit rises What are the two types of pumps? Self-Priming and Flooded Suction Centrifugal 4 inches = 400 gpm What does eliminating dead spots mean? Heated and treated water is equally distributed in the pool Horizontal High Rate Sand Filter increases surface area When do you backwash? When the pressure differential indicates it is needed When do you body feeding (DE) ? during the filter cycle What is oxidation? a chemical process that destroys organic compounds in the pool water What is disinfection? the chemical process that kills or deactivates pathogens What does oxidation do? destroys organics What does sanitation do? destroys bacteria What does poor oxidation result in? cloudy turbid water What is the desirable chlorine compound? HOCl Why is HOCl the desirable chlorine compound? because it oxidizes AND sanitizes When is HOCl produced? Upon gas chlorine, sodium hypochlorite (bleach) or calcium hypochlorite being added to water pH of soda ash dissolved in water pH 13+ Safety considerations for chemical handling require what? eye wash station When are chloramines formed? under a heavy organic load with low chlorine levels, often with limited air movement How do you get rid of chloramines? you super chlorinate How do you obtain combined chlorine? (TC)-(FC) = combined chlorine How do you calculate breakpoint calculation? multiply CC by 10 What should you always do when handling chemicals? wear protective equipment For CSI, what does negative/positive mean Negative = aggressive Positive = scaling