Pool Operators Test UPDATED Exam
Questions and CORRECT Answers
These are used to prevent bathers from diving (shallow water) - CORRECT ANSWER -
Markers (horizontal, vertical, every 20 ft)
Why is high pH a problem? - CORRECT ANSWER - 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 - CORRECT ANSWER - Cyanuric acid
Removes smallest particle size from water - CORRECT ANSWER - Diatomaceous earth filter
Why does algae form? - CORRECT ANSWER - Poor pool water circulation
This prevents floating debris from re-entering the pool - CORRECT ANSWER - Skimmer
weir
How long before patrons can enter the pool after putting liquid chlorine in the water? -
CORRECT ANSWER - 30 minutes
How can chlorine odor be removed? - CORRECT ANSWER - Breakpoint chlorination of
pool water
Why is bromine sometimes used as a disinfectant? - CORRECT ANSWER - Combined
bromine - effective sanitizer
How do you find combined chlorine? - CORRECT ANSWER - Subtract free chlorine from
total chlorine
, What is the operator responsible for? - CORRECT ANSWER - Maintaining daily pool
operation log
What is the purpose of adding chlorine? - CORRECT ANSWER - Sanitizes and prevents
growth of algae
How do you remove stains from pool interior surface? - CORRECT ANSWER - Pool needs to
be drained and acid washed
What can happen if pH is too low? - CORRECT ANSWER - Corrosion of pool components
SA of a rectangular pool (30 by 45 ft) - CORRECT ANSWER - 1350 sq. ft
What can cause cloudy water? - CORRECT ANSWER - Filter malfunction, excessive bather
load, chemical imbalance
Recommended level of free chlorine - CORRECT ANSWER - 1 to 3 ppm
Recommended level of bromine - CORRECT ANSWER - 3 ppm
How do you lower the pH? - CORRECT ANSWER - Add muriatic acid
What chemical is used to raise calcium hardness? - CORRECT ANSWER - Calcium chloride
What could be the problem if the hypochlorinator works but _ chlorine is still present in water? -
CORRECT ANSWER - Damaged, storage vat empty, injection fitting clogged
Recommended range for pH - CORRECT ANSWER - 7.2-7.8
Questions and CORRECT Answers
These are used to prevent bathers from diving (shallow water) - CORRECT ANSWER -
Markers (horizontal, vertical, every 20 ft)
Why is high pH a problem? - CORRECT ANSWER - 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 - CORRECT ANSWER - Cyanuric acid
Removes smallest particle size from water - CORRECT ANSWER - Diatomaceous earth filter
Why does algae form? - CORRECT ANSWER - Poor pool water circulation
This prevents floating debris from re-entering the pool - CORRECT ANSWER - Skimmer
weir
How long before patrons can enter the pool after putting liquid chlorine in the water? -
CORRECT ANSWER - 30 minutes
How can chlorine odor be removed? - CORRECT ANSWER - Breakpoint chlorination of
pool water
Why is bromine sometimes used as a disinfectant? - CORRECT ANSWER - Combined
bromine - effective sanitizer
How do you find combined chlorine? - CORRECT ANSWER - Subtract free chlorine from
total chlorine
, What is the operator responsible for? - CORRECT ANSWER - Maintaining daily pool
operation log
What is the purpose of adding chlorine? - CORRECT ANSWER - Sanitizes and prevents
growth of algae
How do you remove stains from pool interior surface? - CORRECT ANSWER - Pool needs to
be drained and acid washed
What can happen if pH is too low? - CORRECT ANSWER - Corrosion of pool components
SA of a rectangular pool (30 by 45 ft) - CORRECT ANSWER - 1350 sq. ft
What can cause cloudy water? - CORRECT ANSWER - Filter malfunction, excessive bather
load, chemical imbalance
Recommended level of free chlorine - CORRECT ANSWER - 1 to 3 ppm
Recommended level of bromine - CORRECT ANSWER - 3 ppm
How do you lower the pH? - CORRECT ANSWER - Add muriatic acid
What chemical is used to raise calcium hardness? - CORRECT ANSWER - Calcium chloride
What could be the problem if the hypochlorinator works but _ chlorine is still present in water? -
CORRECT ANSWER - Damaged, storage vat empty, injection fitting clogged
Recommended range for pH - CORRECT ANSWER - 7.2-7.8
