CERTIFIED POOL OPERATOR HANDBOOK PRACTICE
TEST 2024-2025 ACTUAL EXAM/ NEWEST CPO-
CERTIFIED POOL OPERATOR EXAM WITH 300+
DETAILED QUESTIONS & CORRECT ANSWERS
(GUARANTEED PASS!NEW EXAM UPDATES!!)
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: - ANSWER- high levels of chloramines in the pool
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
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
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
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
To adjust the tested pH in the pool in question #7 to an acceptable level, which
chemical would be most appropriate? - ANSWER- Sodium Carbonate
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.
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
You are the operator of a 3,000 gallon health club spa, which has an average of 100
users per day. According to the CPO Handbook, how often should the water in this spa
be changed? - ANSWER- 10 days
, “ You are the CPO for a large municipal swimming pool. This pool has a volume of
560,000 gallons of water,and has an average daily bather load of 1300 people. The pool
is operated using high rate pressure sand filters. How often should you backwash the
filters?" - ANSWER- When the influent and effluent gauges are 10 to 20 psi apart
In testing for Chlorine/Bromine in a commercial pool, DPD is preferred over OTO
because: - ANSWER- OTO only tests for Total Chlorine
Safety and rescue equipment should always be: - ANSWER- Kept easily accessible
around the pool
Which type of filter system will remove the smallest micron particles? - ANSWER-
diatomaceous earth
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
TEST 2024-2025 ACTUAL EXAM/ NEWEST CPO-
CERTIFIED POOL OPERATOR EXAM WITH 300+
DETAILED QUESTIONS & CORRECT ANSWERS
(GUARANTEED PASS!NEW EXAM UPDATES!!)
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: - ANSWER- high levels of chloramines in the pool
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
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
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
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
To adjust the tested pH in the pool in question #7 to an acceptable level, which
chemical would be most appropriate? - ANSWER- Sodium Carbonate
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.
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
You are the operator of a 3,000 gallon health club spa, which has an average of 100
users per day. According to the CPO Handbook, how often should the water in this spa
be changed? - ANSWER- 10 days
, “ You are the CPO for a large municipal swimming pool. This pool has a volume of
560,000 gallons of water,and has an average daily bather load of 1300 people. The pool
is operated using high rate pressure sand filters. How often should you backwash the
filters?" - ANSWER- When the influent and effluent gauges are 10 to 20 psi apart
In testing for Chlorine/Bromine in a commercial pool, DPD is preferred over OTO
because: - ANSWER- OTO only tests for Total Chlorine
Safety and rescue equipment should always be: - ANSWER- Kept easily accessible
around the pool
Which type of filter system will remove the smallest micron particles? - ANSWER-
diatomaceous earth
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
