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CERTIFIED POOL & SPA OPERATOR (CPO) PRACTICE EXAM TEST STUDY GUIDE YEAR 2025-2026
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September 2025
2025/2026
A tutor-curated study guide that’s focused on the 2025–2026 test outline. It’s not one of those overwhelming giant review books — it’s more streamlined, exam-style, and straight to the point.
Q1: What is the ideal pH range for swimming pool water?
a) 6.0 – 6.5
b) 6.8 – 7.2
c) 7.2 – 7.8 ■
d) 8.0 – 8.5
Q2: What is the primary purpose of chlorine in pool water?
a) Adjust pH
b) Control algae
c) Sanitize and kill bacteria ■
d) Reduce calcium hardness
Q3: What is the r...
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