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CERTIFIED POOL OPERATOR EXAM | VERIFIED QUESTIONS & WELL DETAILED CORRECT ANSWERS | A+ GRADED | LATEST 2026/2027 EDITION

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CERTIFIED POOL OPERATOR EXAM | VERIFIED QUESTIONS & WELL DETAILED CORRECT ANSWERS | A+ GRADED | LATEST 2026/2027 EDITION

Institution
CPO Certified Pool Operator
Course
CPO certified pool operator

Content preview

12 Reasons why the health inspector will close your pool

ANSWER

1. pump filter not working for more than an hour

2. main drain is not visible

3. chemical readings out of range

4. no pool operator (15 minute grace period)

5. no lifeguard or cpr certs present

6. water is below the skimmer line

7. danger to the public

8. chlorinator is not working

9. health inspector is not allowed in

10. bathrooms + drains not working

11. flow rate is too low

12. no phone (landline)



Measuring records as the CPO

ANSWER

Operator must test the water for Cl and pH every hour, and Total Alkalinity, Calcium Hard-
ness and Cyanuric Acid once per week. Records must be maintained on site and available for
at least 2 years at the pool and 3 years total.



5 Factors of Water Balance

ANSWER

pH, Total Alkalinity, Calcium Hardness, Temperature, and total dissolved liquids



1

, Corrosive water

ANSWER

pH is too low, dissolves everything it contacts



scaling water

ANSWER

pH it too high, mineral deposits on walls or pipes



Regulated pH range

ANSWER

7.2-7.8

pH reading is tested with Phenol Red



To lower pH,

ANSWER

add muriatic acid



To raise the pH,

ANSWER

add sodium carbonate (Soda Ash)

2. sodium bisulfate

3. carbon dioxide



Total Alkalinity

ANSWER

represents the amount of carbonates, bicarbonates, and hydroxides in a solution - you want
this to be high, because the pH resists changes in fluctuating



2

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Institution
CPO certified pool operator
Course
CPO certified pool operator

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