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Pool and Spa Operator Handbook Exam Questions
and Answers | Verified 2025/2026 Edition | Certified
Pool & Spa Operator (CPO) Certification|| NEWEST
EXAM!!!
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:
- 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? - 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.
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The most likely cause of these complaints is: - 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? - 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? - 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? - Answer--0.8
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8. To adjust the tested Total Alkalinity in the pool in
question #7 to an acceptable level, which chemical would
be most appropriate? - 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? - 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?" - Answer-100.8 lbs.
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 the water
to the proper level? - Answer-12,495 gallons
12. You are the operator of a 3,000 gallon health club spa,
which has an average of 100 users per day. According to
Pool and Spa Operator Handbook Exam Questions
and Answers | Verified 2025/2026 Edition | Certified
Pool & Spa Operator (CPO) Certification|| NEWEST
EXAM!!!
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:
- 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? - 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.
,2|Page
The most likely cause of these complaints is: - 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? - 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? - 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? - Answer--0.8
, 3|Page
8. To adjust the tested Total Alkalinity in the pool in
question #7 to an acceptable level, which chemical would
be most appropriate? - 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? - 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?" - Answer-100.8 lbs.
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 the water
to the proper level? - Answer-12,495 gallons
12. You are the operator of a 3,000 gallon health club spa,
which has an average of 100 users per day. According to
