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Certified Pool Operator (CPO) Practice Quiz

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Certified Pool Operator (CPO) Practice Quiz

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2026/2027

Institution Certified Pool Operator Practice

Course Certified Pool Operator Practice

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Certified Pool Operator (CPO) Practice
Quiz

Ideal pH range for pool water - ANSWER...-6.8 - 7.0, 7.2 - 7.8, 8.0 - 8.5, or 6.5 - 7.1

Chemical to increase total alkalinity - ANSWER...-Sodium bicarbonate

Purpose of turnover rate calculation - ANSWER...-Determine how often the pool volume
passes through the filter

Turnover rate of 6 hours - ANSWER...-Means the pool's water volume is filtered once
every 6 hours

Action if free chlorine is below required levels - ANSWER...-Add chlorine

Most common sanitizer used in pools - ANSWER...-Chlorine

Filtration system that removes the smallest particles - ANSWER...-DE (diatomaceous
earth) filter

Langelier Saturation Index (LSI) - ANSWER...-Helps predict scaling or corrosion risk

Cyanuric acid - ANSWER...-Protects chlorine from sunlight degradation

Correct order for balancing pool water chemistry - ANSWER...-Alkalinity → pH →
chlorine

Main danger of mixing chlorine with acid - ANSWER...-Toxic chlorine gas release

Public pools should test chlorine levels - ANSWER...-Daily or more often

Chemical used to lower pH - ANSWER...-Muriatic acid

Turnover rate for a pool holding 90,000 gallons with a flow rate of 150 gallons per
minute - ANSWER...-10 hours

Condition likely to cause algae growth - ANSWER...-Low sanitizer levels

Shocking a pool - ANSWER...-Helps remove chloramines and organic contaminants

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Uploaded on: September 19, 2026
Number of pages: 2
Written in: 2026/2027
Type: Exam (elaborations)
Contains: Questions & answers

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