Certified Pool Operator Handbook Practice
Test – Questions and Answers
1. 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
ANS
clear the pool and raise the free chlorine to 2 ppm
2. 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?
ANS 3.5 gallons
3. 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
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,ANS
high levels of chloramines in the pool
4. 4. To determine the level of chloramines in the water, you should
do which of the following?
ANS test for total chlorine and free chlorine, then subtract the free chlorine number from the
total chlorine
5. 5. You operate a 45,000 gallon indoor pool, and upon doing your
hourly chemical tests you observe the following readings
ANSTotal 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?
ANS 0.8
6. 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
ANS Total alkalinity is 50 ppm pH is
7.2 Calcium Hardness is 150 ppm Temperature is 76 degrees F Total
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, Dissolved Solids is 500 ppm Using these readings, what is the
Saturation Index for this pool?
ANS -0.8
7. 8. To adjust the tested Total Alkalinity in the pool in question #7
to an accept- able level, which chemical would be most appropriate?
ANS Sodium Bicarbonate
8. 9. To adjust the tested pH in the pool in question #7 to an
acceptable level, which chemical would be most appropriate?
ANS Sodium Carbonate
9. 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?"
ANS 100.8 lbs.
10. 11. You are the CPO for a 100 foot long, 50 foot wide country
club pool. The average depth of this pool is 7 feet. You return to the
pool on Monday morning, after a rare weekend off, and find that the
auto-fill feature has failed to work, and the pool water level is four
inches too low. How many gallons of water must be added to return
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Test – Questions and Answers
1. 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
ANS
clear the pool and raise the free chlorine to 2 ppm
2. 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?
ANS 3.5 gallons
3. 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
1/
19
,ANS
high levels of chloramines in the pool
4. 4. To determine the level of chloramines in the water, you should
do which of the following?
ANS test for total chlorine and free chlorine, then subtract the free chlorine number from the
total chlorine
5. 5. You operate a 45,000 gallon indoor pool, and upon doing your
hourly chemical tests you observe the following readings
ANSTotal 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?
ANS 0.8
6. 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
ANS Total alkalinity is 50 ppm pH is
7.2 Calcium Hardness is 150 ppm Temperature is 76 degrees F Total
2/
19
, Dissolved Solids is 500 ppm Using these readings, what is the
Saturation Index for this pool?
ANS -0.8
7. 8. To adjust the tested Total Alkalinity in the pool in question #7
to an accept- able level, which chemical would be most appropriate?
ANS Sodium Bicarbonate
8. 9. To adjust the tested pH in the pool in question #7 to an
acceptable level, which chemical would be most appropriate?
ANS Sodium Carbonate
9. 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?"
ANS 100.8 lbs.
10. 11. You are the CPO for a 100 foot long, 50 foot wide country
club pool. The average depth of this pool is 7 feet. You return to the
pool on Monday morning, after a rare weekend off, and find that the
auto-fill feature has failed to work, and the pool water level is four
inches too low. How many gallons of water must be added to return
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