POOL OPERATOR ACTUAL TEST PAPER
QUESTIONS AND ANSWERS SURE A+
✔✔Caution - ✔✔Could be harmful, but less harmful than products with Danger or
Warning symbol
✔✔Calculating number of gallons in a pool - ✔✔Gallons equals area x average depth x
7.5
✔✔Giardia destroyed at: - ✔✔45 mins at 1ppm(mg/L) of free chlorine at pH of 7.5 or
less
✔✔Bacteria - ✔✔Sensitive to chlorine, so outbreaks in chlorinated pools rare
✔✔Shigella - ✔✔Easily inactivated by pool disinfectants.
✔✔Chlorine and Bromine - ✔✔Most common disinfectants.
✔✔Alkalinity - ✔✔The measure of water's ability to resist changes in pH.
✔✔Low alkalinity - ✔✔1. pH bounce. 2. Etching of pool/spa surface 3. Staining of
surface walls 4. Heater failure
✔✔High Alkalinity - ✔✔pH Lock. 2. Cloudy water 3. Rough surfaces 4. Clogged filters 5
clogged heater elements 6. Reduced circulation
✔✔Lower the pH by: - ✔✔Adding acids or acid salts such as sodium bisulfate to the
pool water.
✔✔Increase the pH by: - ✔✔Adding soda ash(sodium carbonate) to the pool water
✔✔Green or blue- green water - ✔✔Algae problem
QUESTIONS AND ANSWERS SURE A+
✔✔Caution - ✔✔Could be harmful, but less harmful than products with Danger or
Warning symbol
✔✔Calculating number of gallons in a pool - ✔✔Gallons equals area x average depth x
7.5
✔✔Giardia destroyed at: - ✔✔45 mins at 1ppm(mg/L) of free chlorine at pH of 7.5 or
less
✔✔Bacteria - ✔✔Sensitive to chlorine, so outbreaks in chlorinated pools rare
✔✔Shigella - ✔✔Easily inactivated by pool disinfectants.
✔✔Chlorine and Bromine - ✔✔Most common disinfectants.
✔✔Alkalinity - ✔✔The measure of water's ability to resist changes in pH.
✔✔Low alkalinity - ✔✔1. pH bounce. 2. Etching of pool/spa surface 3. Staining of
surface walls 4. Heater failure
✔✔High Alkalinity - ✔✔pH Lock. 2. Cloudy water 3. Rough surfaces 4. Clogged filters 5
clogged heater elements 6. Reduced circulation
✔✔Lower the pH by: - ✔✔Adding acids or acid salts such as sodium bisulfate to the
pool water.
✔✔Increase the pH by: - ✔✔Adding soda ash(sodium carbonate) to the pool water
✔✔Green or blue- green water - ✔✔Algae problem
