Pool Ops Test Questions and Answers
100% pass
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
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 1
, 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
Backwashing is complete when - ✔✔the water in the sight glass is cear
Process of reversing water flow to remove particles from a sand filter - ✔✔Backwashing
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 2
100% pass
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
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 1
, 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
Backwashing is complete when - ✔✔the water in the sight glass is cear
Process of reversing water flow to remove particles from a sand filter - ✔✔Backwashing
100% Pass Guarantee Katelyn Whitman All Rights Reserved © 2025 2
