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CERTIFIED POOL OPERATOR HANDBOOK PRACTICE TEST – 2025/2026 (SOLVED), Exams of Advanced Education

Chamberlain College of NursingAdvanced Education

CERTIFIED POOL OPERATOR HANDBOOK PRACTICE TEST – 2025/2026 (SOLVED)

Typology: Exams

2024/2025

Available from 06/25/2025

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CERTIFIED POOL OPERATOR HANDBOOK PRACTICE TEST –
2025/2026 (SOLVED)
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: - ----Answers---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? - ----Answers---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: - ----
Answers---high levels of chloramines in the pool
4. To determine the level of chloramines in the water, you should do
which of the following? - ----Answers---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
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pf4
pf5
pf8
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CERTIFIED POOL OPERATOR HANDBOOK PRACTICE TEST –

2025/2026 (SOLVED)

  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. 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: - ----Answers---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? - ----Answers---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: - ---- Answers---high levels of chloramines in the pool
  4. To determine the level of chloramines in the water, you should do which of the following? - ----Answers---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. What is the level of chloramines in this pool? - ----Answers---0.

  1. 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? - ---- Answers----0.
  2. To adjust the tested Total Alkalinity in the pool in question #7 to an acceptable level, which chemical would be most appropriate? - ---- Answers---Sodium Bicarbonate
  3. To adjust the tested pH in the pool in question #7 to an acceptable level, which chemical would be most appropriate? - ----Answers--- Sodium Carbonate
  4. 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?" - ----Answers---100.8 lbs.
  5. 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? - ----Answers---12,495 gallons
  1. High calcium hardness can result in what condition? - ---- Answers---cloudy water
  2. Head first entry dives are: - ----Answers---only allowed in areas of the pool that are not marked as 'NO DIVING'
  3. Opening and closing checklists: - ----Answers---all of the above
  4. You can become sick from ingesting water infected with Legionella bacteria - ----Answers---false
  5. Channeling of filters occurs when: - ----Answers---the FMR is exceeded, and water cuts a channel through the media
  6. The only physical factor that affects water balance is: - ---- Answers---temperature
  7. To be classified as a disinfectant, a compound must kill or inactivate 99.9% of contaminants as well as: - ----Answers---leave a measurable residual in the water
  8. Pools using chlorine gas as a disinfectant produce hydrochloric acid, which can be neutralized with: - ----Answers---caustic soda or soda ash
  9. When balancing swimming pool water, the following should be adjusted first: - ----Answers---total alkalinity
  1. A spa with water tested as pH 7.2, temperature 103, calcium hardness 600, total alkalinity 120, and tds of 1,500 will be: - ---- Answers---scale forming
  2. When performing a water test, sample water should be collected: - ----Answers---18 inches below the surface, away from return line
  3. Swimming pool circulation systems should be adjusted to remove:
  • ----Answers---75% from the surface
  1. Vacuuming of the pool bottom should be done: - ----Answers--- after foreign matter has settled
  2. You are a service tech and have gotten a contract to maintain a small motel pool. Upon examining the operational records, you find that the number of gallons in the pool is not listed in the records. You visit the pool and observe that it is a fairly rectangular concrete pool, with the following dimensions: length = 40 feet; width = 20 feet. The pool bottom slope is constant from the shallow end, which is 3 feet deep, to the deep end, which is 8 feet deep. What is the total number of gallons of water in this pool? - ----Answers---33,000 gallons
  3. b.)You are a service tech and have gotten a contract to maintain a small motel pool. Upon examining the operational records, you find that the number of gallons in the pool is not listed in the records. You visit the pool and observe that it is a fairly rectangular concrete pool, with the following dimensions: length = 40 feet; width = 20 feet. The pool bottom slope is constant from the shallow end, which is 3 feet deep, to the deep end, which is 8 feet deep.B). To achieve a 6 hour TOR in this pool, what flow rate would be needed? - ----Answers--- GPM
  1. One cubic foot of water contains gallons. - ----Answers---7.
  2. One cubic foot of water weighs pounds. - ----Answers---62.
  3. One gallon of water weighs pounds. - ----Answers---8.
  4. What effect does gas chlorine have on pH in water? - ----Answers- --lowers
  5. What is the ideal range for total alkalinity? - ----Answers---80 to 120 ppm
  6. The amount of unfiltered water is reduced to after four turnovers.
  • ----Answers---2%
  1. What is considered the necessary backwash rate to achieve proper agitation when backwashing sand filters? - ----Answers---15 gpm/sf
  2. According to the Certified Pool - Spa Operator Handbook, to provide proper building protection and comfort to users the humidity levels for indoor pools and spas should be maintained between - ---- Answers---40 to 60%
  3. What is the process of replacing used diatomaceous earth powder with fresh powder called? - ----Answers---pre.coating
  1. According to the Certified Pool - Spa Operator Handbook, the acceptable pH reading is: - ----Answers---7 2 to 7 8
  2. When determining the degree of saturation and pool water the constant (12.1) includes a factor for Total Dissolved Solids (TDS), assuming a value of less than 1,000 ppm TDS. When the TDS is found to be higher (1,000-2,000 ppm) a value of should be used for the constant." - ----Answers---12.
  3. Water with a pH of less than 7.0 is said to be: - ----Answers--- acidic
  4. According to the Certified Pool - Spa Operator Handbook, the ideal level for total water alkalinity is ppm - ----Answers---80-
  5. Spas and hot tubs require a higher level of chlorine than in swimming pools. The free available chlorine concentration should be maintained at ppm with hourly checks during heavy use. - ---- Answers---3 0-5.
  6. According to the Certified Pool - Spa Operator Handbook, filtration and recirculation pumps should operate _______________ hours continuously for public spas and therapy pools. - ----Answers--- 24
  7. The addition of Trichlor Tables to a swimming pool has what effect of the pH level? - ----Answers---lowers pH
  1. 1 pound per square inch (psi) is the pressure created by a column of water feet high. - ----Answers---2.
  2. In a pool containing 35,000 gallons which is 15 x 40 ft with the temp of 65 degrees F, BTU's would be required to raise the water temperature to 75 degrees F if the air temp is 65 degrees F. - ---- Answers---2,915,
  3. To raise FC in a 20,000 gallon pool by 2.0 ppm would require ounces of calcium hypochlorite. - ----Answers---
  4. Pool surface area accounts for percent of heat loss. - ----Answers--
  1. Green water that is transparent is usually due to. - ----Answers--- copper ions in the water
  2. The most widely accepted flow rate for rapid rate sand filters in a public pool is per sq. ft. - ----Answers---3 gpm
  3. The flow requirement of a rapid rate sand filter during backwashing is gpm per sq. ft. - ----Answers---12-
  4. The backwash ratio for high rate sand filters is ____ - ---- Answers---1:
  1. is the maximum flow rate per sq. ft. for both pressure and vacuum type DE filters in public pools without slurry. - ----Answers-- -2 gpm
  2. The commonly accepted amount of precoat for DE filters is ____ pounds per each sq. ft. of surface area. - ----Answers---0.
  3. To destroy harmful organisms in pool water, the accepted minimum of free chlorine is ____ ppm and many health codes set the maximum FC at ppm. - ----Answers---1, 5
  4. With an incident of diarrheal discharge in a pool, the free available chlorine should be raised to _____ ppm. - ----Answers---
  5. Chlorine added after the breakpoint is reached will exist as. - ---- Answers---free chlorine
  6. Sodium hypochlorite in its commercial form contains percent available chlorine. - ----Answers---10-
  7. Calcium hypochlorite contains percent available chlorine by weight. - ----Answers---
  8. Bromine is similar in many respects to chlorine, however, bromine cannot be used for. - ----Answers---stabilization
  9. The solid chlorine compound which is used when a slow release of chlorine over time is desired is called: - ----Answers---trichlor