Aquatic Facility Operator Test 2025/2026 Questions & Answers Verified 100% Correct

Aquatic Facility Operator Test 2025/2026 Questions & Answers Verified 100% Correct What does oxidation do? - ANSWER -destroys organics What does sanitation do? - ANSWER -destroys bacteria What does poor oxidation result in? - ANSWER -cloudy turbid water What is the desirable chlorine compound? - ANSWER -HOCl Why is HOCl the desirable chlorine compound? - ANSWER -because it oxidizes AND sanitizes When is HOCl produced? - ANSWER -Upon gas chlorine, sodium hypochlorite (bleach) or calcium hypochlorite being added to water pH of soda ash - ANSWER -dissolved in water pH 13+ Safety considerations for chemical handling require what? - ANSWER -eye wash station When are chloramines formed? - ANSWER -under a heavy organic load with low chlorine levels, often with limited air movement How do you get rid of chloramines? - ANSWER -you super chlorinate How do you obtain combined chlorine? - ANSWER -(TC)-(FC) = combined chlorine How do you calculate breakpoint calculation? - ANSWER -multiply CC by 10 What should you always do when handling chemicals? - ANSWER -wear protective equipment For CSI, what does negative/positive mean - ANSWER -Negative = aggressive Positive = scaling What is the most influential variable in the CSI? - ANSWER -pH What is the maximum spa temperature and for how long? - ANSWER -104 degrees for 15 minutes What is total Alkalinity? - ANSWER -this is an index of the water's resistance to pH change What is the best recommendation for CH levels in pools? - ANSWER -300 600ppm Why are pool heaters prone to scale? - ANSWER -because calcium carbonate is more likely to form on elevated temperatures with automation, why are large feed system important? - ANSWER -In order to meet set points quickly What is the most important factor related to pool water chemistry? - ANSWER pH What should you automate if you can only afford to automate one? - ANSWER pH What do typical chemical controllers measure? - ANSWER -ORP and pH What do chemical controllers NOT replace? - ANSWER -pool operator What is oxidation reduction potential (ORP)? - ANSWER -qualitative measure of chlorine's work value (how well it's working) What is the standard minimum ORP for virtually instantaneous pathogen deactivation? - ANSWER -650mV What can an acid demand test tell you? - ANSWER -used to determine how much muriatic acid must be added to high pH water to reach a desired value In a DPD test, what does a flash of pink and then clear tell you? - ANSWER -Cl2 residual is very high Acid wash is what? - ANSWER -damaging last resort Water cloudiness can be due to what? - ANSWER -precipitation of calcium What are polymers? - ANSWER -liquid filter acids What do enzymes do? - ANSWER -digest body fluids and oily polymers What is NOT one of the AFO's primary responsibilities? - ANSWER -Teaching Lessons What should you do every day as a part of your AFO safety duty program? - ANSWER -Facility Inspection How many gallons of water is in one cubic ft? - ANSWER -approximately 7.5 How do you calculate how many gallons are in a pool? - ANSWER -1. calculate the volume (LxW)xDavg 2. multiple by 7.5 gallons Law of Dilution - ANSWER -During a turnover less than half of the water molecules pass through the filter What kind of pools need a higher turnover? - ANSWER -Special pools When do gutters NOT work? - ANSWER -when flooded