UPDATED 2024/2025 POOL AND HOT TUB CPO PRACTICE QUESTIONS AND ANSWERS GRADED AND ALREADY PASSED
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Course
CPO certified pool operator
Institution
CPO Certified Pool Operator
You are the operator for a pool which is 164 feet long and 80 feet wide. The pool bottom has a constant slope which is 4 feet deep at the shallow end, and 10 feet deep at the deep end. What is the volume of this pool in gallons? - CORRECT ANS f
You operate a pool which uses high rate sand fil...
POOL AND HOT TUB CPO PRACTICE
2023 QUESTIONS AND ANSWERS
GRADED AND ALREADY PASSED
You are the operator for a pool which is 164 feet long and 80 feet wide. The pool bot-
tom has a constant slope which is 4 feet deep at the shallow end, and 10 feet deep
at the deep end. What is the volume of this pool in gallons? - CORRECT ANS f
You operate a pool which uses high rate sand filters. You discover that your filter
tank has developed a major leak and must be replaced. Your pool operates with a
flow rate of 525 GPM. Using a filter media rate (fmr) of 15 gallons per minute, what
size sand filter would you need to replace your damaged filter? - CORRECT ANS
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Which chemical is used to lower the pH value of pool or spa water? - CORRECT
ANS
You have a 25,000 gallon hotel pool with a calcium hardness level of 170 ppm. How
much calcium chloride (77%) would be required to increase this to 250 PPM? -
CORRECT ANS
The daily opening checklist should be used to: - CORRECT ANS
Evaporation heat losses from a pool are highest under which environmental condi-
tion? - CORRECT ANS
How much sodium thiosulfate would you need to lower the free chlorine from 18 ppm
to 2.0 ppm in an 150,000 gallon pool? - CORRECT ANS
When should you backwash high rate sand filters that have a single pressure
gauge? - CORRECT ANS
Oxidation Reduction Potential testing (ORP) is measured in: - CORRECT ANS
The reagent commonly used to test pH is: - CORRECT ANS
What condition mandates an immediate closure of your swimming pool? - COR-
RECT ANS
When mechanical cooling is used on an indoor therapeutic pool facility, the recom-
mended ASHRAE fresh air exchange rate should be: - CORRECT ANS
The Occupational Safety and Health Administration (OSHA) requires aquatic facili-
ties to maintain: - CORRECT ANS
An erosion chemical feeder is what type of feeder? - CORRECT ANS
Cyanuric acid (stabilizer) protects free chlorine (FC) against effects of: - COR-
RECT ANS
Which type of filter requires the least amount of water to clean? - CORRECT ANS
What is the likely result if the alkalinity of the pool water is greater than 180 ppm? -
CORRECT ANS
To be classified as a disinfectant, a chemical must kill or inactivate 99.99% of con-
taminants and: - CORRECT ANS
Which chlorine type tends to lower the pH level in water? - CORRECT ANS
The vacuum gauge is installed: - CORRECT ANS
Cloudy or murky green-tinted pool water is usually an indication of: - CORRECT
ANS
To reduce the possibility of suction entrapment an operator should: - CORRECT
ANS
At your swimming pool, failure to provide the appropriate standard of care to the pub-
lic can lead to a case of: - CORRECT ANS
Which chemical could be added to lower the chlorine level of the water? - COR-
RECT ANS
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