POOL OPS TEST QUESTIONS AND
ANSWERS
To prevent a bather from diving into too shallow of water, depth markers should be - On
horizontal surfaces around the pool, on vertical surfaces within the pool, a minimum of
every 20 feet.
Why is high pH a problem in a swimming pool? - Irritate eyes of patrons, reduces
effectiveness of chlorine, results in cloudy water
Cyanuric acid is sometimes used as a stabilizer and must never exceed - 50 ppm
Which filter type removes the smallest particle size? - Diatomaceous Earth
Algae primarily forms in a pool because of - poor water circulation
A skimmer weird - prevents floating debris from re-entering the pool
If you need to raise free chlorine quickly, how long should patrons wait after manually
adding chlorine to the pool? - 30 minutes
If swimmers complain of a chlorine odor (from chloramines), it can best be removed by
a. breakpoint chlorination
b. doing nothing, odor will gradually disappear
c. adding soda ash
d. Backwashing - A. Breakpoint chlorination
acceptable level of free chlorine in swimming pool is - 1-3 ppm
acceptable level of free bromine in swimming pool is (1,3,5, or 8) - 3 ppm
To lower the pH, what may be added to the water - Muriatic Acid
What chemical should you use to raise the calcium hardness? - Calcium Chloride
The hypochlorinator appears to be working, but no chlorine is in the pool. What could be
the problem? (3) - 1. Hypochlorinator tubing may be damaged
2. Liquid chlorine vat may be empty
3. Injection fitting might be clogged
Recommended range for pH - 7.2-7.8
Stains on the interior pool surfaces are usually caused by - Iron
ANSWERS
To prevent a bather from diving into too shallow of water, depth markers should be - On
horizontal surfaces around the pool, on vertical surfaces within the pool, a minimum of
every 20 feet.
Why is high pH a problem in a swimming pool? - Irritate eyes of patrons, reduces
effectiveness of chlorine, results in cloudy water
Cyanuric acid is sometimes used as a stabilizer and must never exceed - 50 ppm
Which filter type removes the smallest particle size? - Diatomaceous Earth
Algae primarily forms in a pool because of - poor water circulation
A skimmer weird - prevents floating debris from re-entering the pool
If you need to raise free chlorine quickly, how long should patrons wait after manually
adding chlorine to the pool? - 30 minutes
If swimmers complain of a chlorine odor (from chloramines), it can best be removed by
a. breakpoint chlorination
b. doing nothing, odor will gradually disappear
c. adding soda ash
d. Backwashing - A. Breakpoint chlorination
acceptable level of free chlorine in swimming pool is - 1-3 ppm
acceptable level of free bromine in swimming pool is (1,3,5, or 8) - 3 ppm
To lower the pH, what may be added to the water - Muriatic Acid
What chemical should you use to raise the calcium hardness? - Calcium Chloride
The hypochlorinator appears to be working, but no chlorine is in the pool. What could be
the problem? (3) - 1. Hypochlorinator tubing may be damaged
2. Liquid chlorine vat may be empty
3. Injection fitting might be clogged
Recommended range for pH - 7.2-7.8
Stains on the interior pool surfaces are usually caused by - Iron
