Certified Pool Operator Handbook Practice Test – Questions With 100% Complete Solutions

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: - ANSWERclear 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? - ANSWER3.5 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: - ANSWERhigh levels of chloramines in the pool 4. To determine the level of chloramines in the water, you should do which of the following? - ANSWERtest 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? - ANSWER0.8 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 8. To adjust the tested Total Alkalinity in the pool in question #7 to an acceptable level, which chemical would be most appropriate? - ANSWERSodium Bicarbonate 9. To adjust the tested pH in the pool in question #7 to an acceptable level, which chemical would be most appropriate? - ANSWERSodium 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?" - ANSWER100.8 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? - ANSWER12,495 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 the CPO Handbook, how often should the water in this spa be changed? - ANSWER10 days "13. 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?" - ANSWERWhen the influent and effluent gauges are 10 to 20 psi apart 14. In testing for Chlorine/Bromine in a commercial pool, DPD is preferred over OTO because: - ANSWEROTO only tests for Total Chlorine 15. Safety and rescue equipment should always be: - ANSWERKept easily accessible around the pool 16. Which type of filter system will remove the smallest micron particles? - ANSWERdiatomaceous earth 17. If the pump fails to prime, which of the following does not have to be checked? - ANSWERfilter system pressure is too high 18. Oxidation Reduction Potential testing (ORP) is measured in? - ANSWERmV 19. High calcium hardness can result in what condition? - ANSWERcloudy water 20. Head first entry dives are: - ANSWERonly allowed in areas of the pool that are not marked as 'NO DIVING' 21. Opening and closing checklists: - ANSWERall of the above 22. You can become sick from ingesting water infected with Legionella bacteria - ANSWERfalse 23. Channeling of filters occurs when: - ANSWERthe FMR is exceeded, and water cuts a channel through the media 24. The only physical factor that affects water balance is: - ANSWERtemperature 25. To be classified as a disinfectant, a compound must kill or inactivate 99.9% of contaminants as well as: - ANSWERleave a measurable residual in the water 26. Pools using chlorine gas as a disinfectant produce hydrochloric acid, which can be neutralized with: - ANSWERcaustic soda or soda ash 27. When balancing swimming pool water, the following should be adjusted first: - ANSWERtotal alkalinity 28. A spa with water tested as pH 7.2, temperature 103, calcium hardness 600, total alkalinity 120, and tds of 1,500 will be: - ANSWERscale forming 29. When performing a wat