CERTIFIED POOL OPERATOR HANDBOOK
2025 EXAM WITH ANSWERS.
1. You operate a 120,000-gallon pool, and upon performing your hourly
chemical tests you observe the following readings: Total Available Chlorine
reading is 1.6 free available chlorine reading is 1.5 pH is 7.4 Your supervising
lifeguard has just informed you that you have had a fecal incident occur; a
solid stool has been discharged into the pool. According to the Centers for
Disease Control, as the CPO, you should do the following: -correct answer
-clear the pool and raise the free chlorine to 2 ppm
2. Assuming that your local health department requires you to raise the free
chlorine to 5 ppm, how much sodium hypochlorite would be needed to raise
the free chlorine in the pool in question #1 to that level? -correct answer -3.5
gallons
3. You are the CPO for an indoor health club pool. The facility manager
informs you that he is receiving complaints about a strong chlorine odor in
the pool area, and several members have complained of eye irritation. The
most likely cause of these complaints is: -correct answer -high levels of
chloramines in the pool
4. To determine the level of chloramines in the water, you should do which of
the following? -correct answer -test for total chlorine and free chlorine, then
subtract the free chlorine number from the total chlorine
, 5. You operate a 45,000 gallon indoor pool, and upon doing your hourly
chemical tests you observe the following readings:Total available chlorine is
2.2 Free available chlorine is 1.4 and pH is 7.6 What is the level of
chloramines in this pool? -correct answer - 0.8
7. You are the operator of a 330,000 gallon outdoor pool. Your local health
department requires you to perform a water balance calculation once monthly.
Upon performing the water tests necessary to perform this calculation, you
observe the following readings in your pool: Total alkalinity is 50 ppm pH is
7.2 Calcium Hardness is 150 ppm Temperature is 76 degrees F Total
Dissolved Solids is 500 ppm Using these readings, what is the Saturation
Index for this pool? -correct answer --0.8
8. To adjust the tested Total Alkalinity in the pool in question #7 to an
acceptable level, which chemical would be most appropriate? - correct answer -
Sodium Bicarbonate
9. To adjust the tested pH in the pool in question #7 to an acceptable level,
which chemical would be most appropriate? - correct answer -Sodium
Carbonate
10. You are the CPO for a 28,000 gallon hotel pool. You perform a water
balance chemical test, and to your surprise, the Calcium Hardness is only 100
ppm. How much calcium chloride (77%) would be required to increase this to
400 ppm?" -correct answer -
100.8 lbs.
2025 EXAM WITH ANSWERS.
1. You operate a 120,000-gallon pool, and upon performing your hourly
chemical tests you observe the following readings: Total Available Chlorine
reading is 1.6 free available chlorine reading is 1.5 pH is 7.4 Your supervising
lifeguard has just informed you that you have had a fecal incident occur; a
solid stool has been discharged into the pool. According to the Centers for
Disease Control, as the CPO, you should do the following: -correct answer
-clear the pool and raise the free chlorine to 2 ppm
2. Assuming that your local health department requires you to raise the free
chlorine to 5 ppm, how much sodium hypochlorite would be needed to raise
the free chlorine in the pool in question #1 to that level? -correct answer -3.5
gallons
3. You are the CPO for an indoor health club pool. The facility manager
informs you that he is receiving complaints about a strong chlorine odor in
the pool area, and several members have complained of eye irritation. The
most likely cause of these complaints is: -correct answer -high levels of
chloramines in the pool
4. To determine the level of chloramines in the water, you should do which of
the following? -correct answer -test for total chlorine and free chlorine, then
subtract the free chlorine number from the total chlorine
, 5. You operate a 45,000 gallon indoor pool, and upon doing your hourly
chemical tests you observe the following readings:Total available chlorine is
2.2 Free available chlorine is 1.4 and pH is 7.6 What is the level of
chloramines in this pool? -correct answer - 0.8
7. You are the operator of a 330,000 gallon outdoor pool. Your local health
department requires you to perform a water balance calculation once monthly.
Upon performing the water tests necessary to perform this calculation, you
observe the following readings in your pool: Total alkalinity is 50 ppm pH is
7.2 Calcium Hardness is 150 ppm Temperature is 76 degrees F Total
Dissolved Solids is 500 ppm Using these readings, what is the Saturation
Index for this pool? -correct answer --0.8
8. To adjust the tested Total Alkalinity in the pool in question #7 to an
acceptable level, which chemical would be most appropriate? - correct answer -
Sodium Bicarbonate
9. To adjust the tested pH in the pool in question #7 to an acceptable level,
which chemical would be most appropriate? - correct answer -Sodium
Carbonate
10. You are the CPO for a 28,000 gallon hotel pool. You perform a water
balance chemical test, and to your surprise, the Calcium Hardness is only 100
ppm. How much calcium chloride (77%) would be required to increase this to
400 ppm?" -correct answer -
100.8 lbs.
