Test Questions Answers

Certified Pool Operator Handbook Practice Test Questions & Answers

• 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

• 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

• 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:

(Ans- high levels of chloramines in the pool

• 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

• / 2

• 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?(Ans- 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?(Ans- -0.8

• To adjust the tested Total Alkalinity in the pool in question #7 to an

acceptable level, which chemical would be most appropriate?(Ans- Sodium Bicarbonate

• To adjust the tested pH in the pool in question #7 to an acceptable level,

which chemical would be most appropriate?(Ans- 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?"

• / 2