CPO Certification Practice Test
You operate a 120,000 gallon pool, and upon performing B. clear the pool and raise the free chlorine to 2 ppm
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:
A. clear the pool of users and boost the free chlorine to 17
ppm
B. clear the pool and raise the free chlorine to 2 ppm
C. allow swimmers to remain in the pool, but raise the free
chlorine to 10 ppm.
D. none of the above
Assuming that your local health department requires you to B. 3.5 gallons
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?
A. 6 gallons
B. 3.5 gallons
C. 9 gallons
D. 35 gallons
You are the CPO for an indoor health club pool. The facility C. high levels of chloramines in the pool
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:
A. too much free chlorine in the water
B. too few swimmers in the pool
C. high levels of chloramines in the pool
D. high calcium levels in the water
To determine the level of chloramines in the water, you B. test for total chlorine and free chlorine, then subtract the free chlorine number
should do which of the following? from the total chlorine number
A. test for free chlorine and pH, then divide the pH number
by the free chlorine number
B. test for total chlorine and free chlorine, then subtract the
free chlorine number from the total chlorine number
C. test for total chlorine and combined chlorine, then
subtract the combined chlorine number from the free
chlorine number
D. test for total alkalinity and pH, then multiply the total
alkalinity number by the pH number
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
pH is 7.6
What is the level of chloramines in this pool?
A. 3.6
B. .8
C. -.8
D. 2.8
, CPO Certification Practice Test
To remove the chloramines in the pool in question #5, how A) A
much of the following compounds would be needed? B) B
A). Using Chlorine gas: C) A
A. 4 lbs.
B. 24.13 lbs.
C. 5.666 lbs.
D. 2.413 lbs.
B). Using Sodium Hypochlorite:
A. 12 gallons
B. 2.48 gallons
C. 4.05 gallons
D. 3.11 gallons
C). Using Calcium Hypochlorite:
A. 3.71 lbs.
B. 2.36 lbs.
C. 37.1 lbs.
D. 5 lbs.
You are the operator of a 330,000 gallon outdoor pool. C. -0.8
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 76F
Total Dissolved Solids is 500 ppm
Using these readings, what is the Saturation Index for this
pool?
A. +0.8
B. +0.3
C. -0.8
D. -8.0
To adjust the tested Total Alkalinity in the pool in question B. Sodium Bicarbonate
#7 to an acceptable level, which chemical would be most
appropriate?
A. Sodium Hypochlorite
B. Sodium Bicarbonate
C. Sodium Carbonate
D. Sodium Chloride
To adjust the tested pH in the pool in question #7 to an A. Sodium Carbonate
acceptable level, which chemical would be most
appropriate?
A. Sodium Carbonate
B. Sodium Chloride
C. Chlorine Gas
D. Sodium Thiosulfate
You are the CPO for a 28,000 gallon hotel pool. You C. 100.8 lbs.
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?
A. 10 lbs.
B. 1,000 lbs.
C. 100.8 lbs.
D. 1.0 lbs.
You operate a 120,000 gallon pool, and upon performing B. clear the pool and raise the free chlorine to 2 ppm
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:
A. clear the pool of users and boost the free chlorine to 17
ppm
B. clear the pool and raise the free chlorine to 2 ppm
C. allow swimmers to remain in the pool, but raise the free
chlorine to 10 ppm.
D. none of the above
Assuming that your local health department requires you to B. 3.5 gallons
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?
A. 6 gallons
B. 3.5 gallons
C. 9 gallons
D. 35 gallons
You are the CPO for an indoor health club pool. The facility C. high levels of chloramines in the pool
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:
A. too much free chlorine in the water
B. too few swimmers in the pool
C. high levels of chloramines in the pool
D. high calcium levels in the water
To determine the level of chloramines in the water, you B. test for total chlorine and free chlorine, then subtract the free chlorine number
should do which of the following? from the total chlorine number
A. test for free chlorine and pH, then divide the pH number
by the free chlorine number
B. test for total chlorine and free chlorine, then subtract the
free chlorine number from the total chlorine number
C. test for total chlorine and combined chlorine, then
subtract the combined chlorine number from the free
chlorine number
D. test for total alkalinity and pH, then multiply the total
alkalinity number by the pH number
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
pH is 7.6
What is the level of chloramines in this pool?
A. 3.6
B. .8
C. -.8
D. 2.8
, CPO Certification Practice Test
To remove the chloramines in the pool in question #5, how A) A
much of the following compounds would be needed? B) B
A). Using Chlorine gas: C) A
A. 4 lbs.
B. 24.13 lbs.
C. 5.666 lbs.
D. 2.413 lbs.
B). Using Sodium Hypochlorite:
A. 12 gallons
B. 2.48 gallons
C. 4.05 gallons
D. 3.11 gallons
C). Using Calcium Hypochlorite:
A. 3.71 lbs.
B. 2.36 lbs.
C. 37.1 lbs.
D. 5 lbs.
You are the operator of a 330,000 gallon outdoor pool. C. -0.8
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 76F
Total Dissolved Solids is 500 ppm
Using these readings, what is the Saturation Index for this
pool?
A. +0.8
B. +0.3
C. -0.8
D. -8.0
To adjust the tested Total Alkalinity in the pool in question B. Sodium Bicarbonate
#7 to an acceptable level, which chemical would be most
appropriate?
A. Sodium Hypochlorite
B. Sodium Bicarbonate
C. Sodium Carbonate
D. Sodium Chloride
To adjust the tested pH in the pool in question #7 to an A. Sodium Carbonate
acceptable level, which chemical would be most
appropriate?
A. Sodium Carbonate
B. Sodium Chloride
C. Chlorine Gas
D. Sodium Thiosulfate
You are the CPO for a 28,000 gallon hotel pool. You C. 100.8 lbs.
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?
A. 10 lbs.
B. 1,000 lbs.
C. 100.8 lbs.
D. 1.0 lbs.
