CPO CERTIFIED POOL OPERATOR ACTUAL
TEST 2026 COMPLETE QUESTIONS AND
SOLUTIONS
◉ 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
TEST 2026 COMPLETE QUESTIONS AND
SOLUTIONS
◉ 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
