1. You operate a 120,000-gallon pool, and upon performing your hourly chemical tests you observe the following readings: Total Available Chlorine reading
... [Show More] 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: Correct 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? Correct 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. The most likely cause of these complaints is: Correct 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? Correct 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? Correct 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? Correct Answer: -0.8
8. To adjust the tested Total Alkalinity in the pool in question #7 to an acceptable level, which chemical would be most appropriate? Correct 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? Correct 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?" Correct Answer: 100.8 lbs. [Show Less]