Certified Pool Operator Handbook Practice Test – 2025 (Correct Answers)

Certified Pool Operator Handbook Practice Test – 2025
(Correct Answers)


1. 1. You operate a 120,000-t t t t



gallon pool, and upon performing your hourly chemical tests you observe the following read
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ings:Total Available Chlorine reading is 1.6 free available chlorine reading is 1.5 pH is 7.4You
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r supervising lifeguard has just informed you that you have had a fecal incident occur; a soli
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d stool has been discharged into the pool. According to the Centers for Disease Control, as t
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he CPO, you should do the following:: clear the pool and raise the free chlorine to 2 ppm
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2. 2.Assuming that your local health department requires you to raise the free chlorine to 5 pp
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m, how much sodium hypochlorite would be needed to raise the free chlorine in the pool in q
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uestion #1 to that level?: 3.5 gallons t t t t t t



3. 3. You are the CPO for an indoor health club pool.The facility manager informs you that he i
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sreceiving complaints about a strong chlorine odor in the pool area, and several members ha
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ve complained of eye irritation.The most likely cause of these complaints is:: high levels of c
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4. 4. To determine the level of chloramines in the water, you should do which of the following
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?: test for total chlorine and free chlorine, then subtract the free chlorine number from the total
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chlorine
5. 5. You operate a 45,000 gallon indoor pool, and upon doing your hourly chemical tests yo
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u observe the following readings:Total available chlorine is
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2.2 Free available chlorine is 1.4 and pH is 7.6What is the level of chloramines in this pool?: 0.8
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6. 7. You are the operator of a 330,000 gallon outdoor pool.Your local health department req
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uires you to perform a water balance calculation once monthly. Upon performing the water te
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sts necessary to perform this calculation, you observe the following readings in your pool:T
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otal alkalinity is 50 ppm pH is
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7.2CalciumHardness is150ppmTemperature is 76 degrees F Total Dissolved Solids is 500 pp
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m Using these readings, what is the Saturation Index for this pool?: -0.8
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7. 8.To adjust thetested Total Alkalinity in the pool in question #7 to an accept-
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, able level, which chemical would be most appropriate?: Sodium Bicarbonate
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8. 9. To adjust the tested pH in the pool in question #7 to an acceptable level, which chemica
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l would be most appropriate?: Sodium Carbonate
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9. 10. You are the CPO for a 28,000 gallon hotel pool.You perform a water balance chemical t
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est,and to your surprise,the Calcium Hardness is only 100 ppm. How much calcium chloride
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(77%) would be required to increase this to 400 ppm?": 100.8 lbs.
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10. 11.You are the CPO for a 100 foot long,50 foot wide country club pool.The averagedepth of
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thispool is 7feet.You returnto the pool on Mondaymorning,
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2t/t
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