Pool Operators Test Questions and Answers 2023

Pool Operators Test Questions and Answers 20231 2 Reasons to shut the pool 1. Danger to the public 2. chemical readings out of range (chlorine and pH) 3. no pool operator 4. no lifeguard/ CPR certificate 5. bathroom/ drains not working 6. pump not working for more than an hour 7. chlorinator not working 8. flow rate is too low 9. can't see the main drain (deepest part of the pool) 10. water is below the skimmer 11. no phone / landline 12. health inspector not allowed in What is the lifeguard to swimmer ratio? 50-1 Certified Pool Operator must be how far in order for the pool to open? 15 minutes How often should readings for pH and chlorine take place every 1 hour How long do records need to be held? 2 years at the pool and 3 years total What is they key to a safe facility? Prevention Most drownings of victims happen when? under 4 feet of water under 4 feet tall under 7 years old What does water balance consist of? (5) pH, Total Alkalinity, Calcium Hardness, Temperature, and Total Dissolved solids (chlorine only disinfects water, it does not maintain sanitary qualities) when does corrosive water happen? -when the water balance is too low -satisfies its hunger by dissolving it comes in contact with -attacks metals and iron When does scaling water happen? - when water balance is too high -relieve its overfed condition by releasing precipitates as scale , cloudiness, and residue what is pH? how basic or how acidic a solution is explain the pH scale. 0-6: acidic 7: neutral 8-14: basic what is the pH of the human eye? 7.5 -- so a pool should try to maintain 7.5 also Health Department regulation for pH and how often it should be checked 7.2-7.8 and every 1 hour for pool and spa what is phenol red? -what the pH value is tested with If the pH of the water is too high what should you do? 1. Muriatic Acid (12 oz per 10,000 gallons to decrease pH by 0.2 units) 2. Sodium Bisulfate/ Dry Acid (1 lb per 10,000 gallons) 3. Carbon Dioxide If the pH of the water is too low what should you do? Sodium Carbonate (Soda Ash) - 6 oz per 10,000 gallons to increase pH by 0.2 What is Total Alkalinity - represents the amount of carbonates, bicarbonates, and hydroxides in a solution - the ability if a solution to resist change in pH pH Bounce when the total alkalinity is too low their will be wide fluctuations of pH (can be so unpredictable it can change hour to hour) Health Department regulation for total alkalinity? 60-180 must be tested every week for the pool and every day for a spa If total alkalinity is too high? Muriatic Acid If total alkalinity is too low? Sodium Bicarbonate (soda ash) Calcium Hardness hardness is a measure of the mineral content of water (water is referred to as too hard or too soft) Hard Water - produce scaling - green tint Soft Water -foams -causes corrosion / destroy all metals surface etching and pitting Health Department regulation for calcium hardness? 150-400 must be checked every week for a pool and every day for a spa If calcium hardness is too high? drain and replace if calcium hardness is too low? calcium chloride (mix into Luke warm water before adding to the pool because its an ice melt product) Total dissolved solids sum of all organic and inorganic materials dissolved in the water (ex: sweat, urine, minerals, salts) What does too much TSD do? 1. enhance algae growth 2. increase corrosion 3. scaling 4. cloudy water 5. foaming 6. water balance is hard to maintain e sanitizer efficiency Health department regulation for TDS ? less than 1500 What happens if the TDS reaches maximum level? drain and fill Maximum temperature for a swimming pool? 88 degrees maximum temperature for a therapy pool? 96 degrees maximum temperature for a spa? 104 degrees What is the Langelier Saturation Index ? pH + CF +AF + TF - 12.1 pH + Calcium Hardness+ Total Alk + Temp - 12.1 What does the Langelier Saturation Index mean? 0 = perfectly balanced negative = corrosion positive = scaling What is the acceptable range of the Langelier Saturation Index -.5 -- .5 pseudomonas -bacteria that thrives in warm water -prevalent in spas how to disinfect a contaminated area? 1/4 cup of bleach or chlorine per 1 galloon of water cryptosporidum -a microorganism that has become recognized as a frequent cause of waterborne disease in humans -goes into the fecal- oral route -symptoms: diarrhea -transmitted by: geese and duck feces Giardia -germ that causes diarrhea - Children's diapers must wear a diaper with ribber pants and an elastic employees have the right to know...? 1. may come in contact with blood 2. may come in contact with dangerous chemicals 3. personal protective equipment is provided 4. material safety data sheets (MSDS) Chlorine is the best disinfectant in the Halogen family because it is the best ___ oxidizer Unstabilized (Inorganic Chlorine) -sensitive to the sun's UV rays - very impractical for an outdoor facility -need to use an additional chemical, Stabilizer Stabilizer to prevent the UV rays from decomposing (eating up) the chlorine residual (chlorine level) Cyanuric Acid chemical used to stabilize a pool Health Department regulation for cyanuric acid 30-100 - works best at 50 - doesn't work over 100 -must be tested every week What chlorine do pool use? sodium hypochlorite (liquid chlorine) Gas chlorine -pH= 2.0 -- need soda ash to keep pH stable - 100% strong -banned from MD -vent fan is near floor -chain tanks to wall -spray bottle of Ammonia -gas mask Sodium Hypochlorite -12% strong -high pH= 14 -need muriatic acid to lower pH - sodium hypochlorite + muriatic acid = mustard gas