CERTIFIED POOL OPERATOR CPO
HANDBOOK FINAL STUDY SHEET 2026
SOLVED QUESTIONS FULLY CORRECT
⫸ Ideal chorine level for a pool is: Answer: 1ppm to 5ppm
⫸ Maximum level of chlorine in a pool is: Answer: 5ppm
⫸ If you see bubbles coming up from a return, the possible cause could
be Answer: a bad seal on the hair/lint strainer - it is not properly closed,
or air is in the filter, or water level is too low
⫸ The hypochlorinator doesn't work. What could be a possible cause for
this?
a) no chlorine in the vat
b) the injection fitting is clogged
c) the tube assembly needs to be changed
d) all of the above Answer: d) all of the above
⫸ You go to the pool in the morning and notice the chlorine is at zero.
You hand-feed chlorine, how long to do you have to wait to allow
people to go into the pool.
, a) no time
b) 15 minutes
c) 30 minutes
d) One day Answer: c) 30 minutes
⫸ When doing the pH test and the sample turns yellow, what does it
mean? Answer: pH is too low
⫸ When doing the pH test and the sample turns purple, what does it
mean? Answer: pH is too high
⫸ What do you do if a patron complains of a chlorine smell and their
eyes are stinging? Answer: Raise the chlorine to Breakpoint Level.
⫸ If the telephone at the pool doesn't work Answer: close the pool
⫸ What should you use when handling chemicals? Answer: Personal
Protective Equipment - Gloves, Goggles, Apron
⫸ What happens if the alkalinity level is too low? Answer: pH is
difficult to maintain, the water will cause damage to the pool walls
⫸ ADD CHEMICALS TO WATER; DO NOT ADD WATER TO
CHEMICALS Answer: ...
HANDBOOK FINAL STUDY SHEET 2026
SOLVED QUESTIONS FULLY CORRECT
⫸ Ideal chorine level for a pool is: Answer: 1ppm to 5ppm
⫸ Maximum level of chlorine in a pool is: Answer: 5ppm
⫸ If you see bubbles coming up from a return, the possible cause could
be Answer: a bad seal on the hair/lint strainer - it is not properly closed,
or air is in the filter, or water level is too low
⫸ The hypochlorinator doesn't work. What could be a possible cause for
this?
a) no chlorine in the vat
b) the injection fitting is clogged
c) the tube assembly needs to be changed
d) all of the above Answer: d) all of the above
⫸ You go to the pool in the morning and notice the chlorine is at zero.
You hand-feed chlorine, how long to do you have to wait to allow
people to go into the pool.
, a) no time
b) 15 minutes
c) 30 minutes
d) One day Answer: c) 30 minutes
⫸ When doing the pH test and the sample turns yellow, what does it
mean? Answer: pH is too low
⫸ When doing the pH test and the sample turns purple, what does it
mean? Answer: pH is too high
⫸ What do you do if a patron complains of a chlorine smell and their
eyes are stinging? Answer: Raise the chlorine to Breakpoint Level.
⫸ If the telephone at the pool doesn't work Answer: close the pool
⫸ What should you use when handling chemicals? Answer: Personal
Protective Equipment - Gloves, Goggles, Apron
⫸ What happens if the alkalinity level is too low? Answer: pH is
difficult to maintain, the water will cause damage to the pool walls
⫸ ADD CHEMICALS TO WATER; DO NOT ADD WATER TO
CHEMICALS Answer: ...
