Pool Operator Test Exam Questions
and Answers 100% Pass
These are used to prevent bathers from diving (shallow water) - ✔✔Markers
(horizontal, vertical, every 20 ft)
Why is high pH a problem? - ✔✔Irritates, reduces chlorine effectiveness, makes for
cloudy water
Serves as a stabilizer, can't exceed 50 ppm; reduces effectiveness of chlorine but
prevents chlorine from being destroyed by the sun - ✔✔Cyanuric acid
Removes smallest particle size from water - ✔✔Diatomaceous earth filter
Why does algae form? - ✔✔Poor pool water circulation
This prevents floating debris from re-entering the pool - ✔✔Skimmer weir
How long before patrons can enter the pool after putting liquid chlorine in the water? -
✔✔30 minutes
How can chlorine odor be removed? - ✔✔Breakpoint chlorination of pool water
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 1
, Why is bromine sometimes used as a disinfectant? - ✔✔Combined bromine - effective
sanitizer
How do you find combined chlorine? - ✔✔Subtract free chlorine from total chlorine
What is the operator responsible for? - ✔✔Maintaining daily pool operation log
What is the purpose of adding chlorine? - ✔✔Sanitizes and prevents growth of algae
How do you remove stains from pool interior surface? - ✔✔Pool needs to be drained
and acid washed
What can happen if pH is too low? - ✔✔Corrosion of pool components
SA of a rectangular pool (30 by 45 ft) - ✔✔1350 sq. ft
What can cause cloudy water? - ✔✔Filter malfunction, excessive bather load, chemical
imbalance
Recommended level of free chlorine - ✔✔1 to 3 ppm
Recommended level of bromine - ✔✔3 ppm
How do you lower the pH? - ✔✔Add muriatic acid
What chemical is used to raise calcium hardness? - ✔✔Calcium chloride
What could be the problem if the hypochlorinator works but _ chlorine is still present in
water? - ✔✔Damaged, storage vat empty, injection fitting clogged
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 2
and Answers 100% Pass
These are used to prevent bathers from diving (shallow water) - ✔✔Markers
(horizontal, vertical, every 20 ft)
Why is high pH a problem? - ✔✔Irritates, reduces chlorine effectiveness, makes for
cloudy water
Serves as a stabilizer, can't exceed 50 ppm; reduces effectiveness of chlorine but
prevents chlorine from being destroyed by the sun - ✔✔Cyanuric acid
Removes smallest particle size from water - ✔✔Diatomaceous earth filter
Why does algae form? - ✔✔Poor pool water circulation
This prevents floating debris from re-entering the pool - ✔✔Skimmer weir
How long before patrons can enter the pool after putting liquid chlorine in the water? -
✔✔30 minutes
How can chlorine odor be removed? - ✔✔Breakpoint chlorination of pool water
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 1
, Why is bromine sometimes used as a disinfectant? - ✔✔Combined bromine - effective
sanitizer
How do you find combined chlorine? - ✔✔Subtract free chlorine from total chlorine
What is the operator responsible for? - ✔✔Maintaining daily pool operation log
What is the purpose of adding chlorine? - ✔✔Sanitizes and prevents growth of algae
How do you remove stains from pool interior surface? - ✔✔Pool needs to be drained
and acid washed
What can happen if pH is too low? - ✔✔Corrosion of pool components
SA of a rectangular pool (30 by 45 ft) - ✔✔1350 sq. ft
What can cause cloudy water? - ✔✔Filter malfunction, excessive bather load, chemical
imbalance
Recommended level of free chlorine - ✔✔1 to 3 ppm
Recommended level of bromine - ✔✔3 ppm
How do you lower the pH? - ✔✔Add muriatic acid
What chemical is used to raise calcium hardness? - ✔✔Calcium chloride
What could be the problem if the hypochlorinator works but _ chlorine is still present in
water? - ✔✔Damaged, storage vat empty, injection fitting clogged
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 2
