CPO Test 2027 Questions and Answers | Practice Questions
with Verified Answers | Graded A+
Question 1.
Cyanuric acid (stabilizer) protects free chlorine (FC) against the effects of:
(A) Pathogens like Crypto, Giardia, and Shigella
(B) High Total dissolved solids
(C) Ultraviolet rays from the sun (D) High PH
Correct Answer: (C) Ultraviolet rays from the sun
Question 2.
An erosion chemical feeder is what type of feeder?
(A) Peristaltic pump
(B) Piston pump
(C) Dry chemical feeder (D) Gas system
Correct Answer: (C) Dry chemical feeder
Question 3.
OSHA requires aquatic facilities to maintain:
(A) Safety Data Sheets only for sanitizing chemicals
(B) Lifeguard certifications
(C) Air temperature recordings (D) SDS's for all chemicals used at the facility
Correct Answer: (D) SDS's for all chemicals used at the facility
Question 4.
When mechanical cooling is used on an indoor therapeutic pool facility, the
recommended ASHRAE fresh air exchange rate should be:
(A) 2 to 4 exchanges per hour
(B) 4 to 6 exchanges per hour
(C) 6 to 8 exchanges per hour (D) As many as possible
Correct Answer: (B) 4 to 6 exchanges per hour
Question 5.
What condition mandates an immediate closure of your swimming pool?
(A) Locker room is not clean
(B) Main drain not visible from the deck
(C) No automatic feeders installed (D) No underwater lights installed
Correct Answer: (B) Main drain not visible from the deck
, Question 6.
The reagent commonly used to test PH is:
(A) DPD
(B) Sodium Thiosulfate
(C) Coolomatic (D) Phenol red
Correct Answer: (D) Phenol red
‣ When should you backwash high rate sand filters that have a single pressure
gauge?
(A) After an 8 to 10 psi increase above starting pressure
(B) Every 2 days
(C) Once per week (D) When the influent and effluent gauges are 10 to 20 psi
apart -✓✓(A) After an 8 to 10 psi increase above starting pressure
Question 7.
Oxidation Reduction Potential testing (ORP) is measured in:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm) (D) Free available chlorine (FAC)
Correct Answer: (B) Millivolts (mV)
Question 8.
How much sodium thiosulfate would you need to lower the free chlorine from 18 ppm to
2.0 ppm in a 150,000 gallon pool?
(A) 35 lbs.
(B) 30 lbs.
(C) 25 lbs. (D) 39 lbs.
Correct Answer: (D) 39 lbs.
Question 9.
Evaporation heat losses from a pool are highest under which environmental condition?
(A) High relative humidity (B) Low relative humidity
(C) Clear sky (D) Low barometric pressure
Correct Answer: (B) Low relative humidity
Question 10.
The daily opening checklist should be used to:
(A) Check the design of the facility
(B) Ensure all safety equipment is in place
(C) Check that all ground wires are properly connected (D) Ensure the heater is properly
sized
Correct Answer: (B) Ensure all safety equipment is in place
with Verified Answers | Graded A+
Question 1.
Cyanuric acid (stabilizer) protects free chlorine (FC) against the effects of:
(A) Pathogens like Crypto, Giardia, and Shigella
(B) High Total dissolved solids
(C) Ultraviolet rays from the sun (D) High PH
Correct Answer: (C) Ultraviolet rays from the sun
Question 2.
An erosion chemical feeder is what type of feeder?
(A) Peristaltic pump
(B) Piston pump
(C) Dry chemical feeder (D) Gas system
Correct Answer: (C) Dry chemical feeder
Question 3.
OSHA requires aquatic facilities to maintain:
(A) Safety Data Sheets only for sanitizing chemicals
(B) Lifeguard certifications
(C) Air temperature recordings (D) SDS's for all chemicals used at the facility
Correct Answer: (D) SDS's for all chemicals used at the facility
Question 4.
When mechanical cooling is used on an indoor therapeutic pool facility, the
recommended ASHRAE fresh air exchange rate should be:
(A) 2 to 4 exchanges per hour
(B) 4 to 6 exchanges per hour
(C) 6 to 8 exchanges per hour (D) As many as possible
Correct Answer: (B) 4 to 6 exchanges per hour
Question 5.
What condition mandates an immediate closure of your swimming pool?
(A) Locker room is not clean
(B) Main drain not visible from the deck
(C) No automatic feeders installed (D) No underwater lights installed
Correct Answer: (B) Main drain not visible from the deck
, Question 6.
The reagent commonly used to test PH is:
(A) DPD
(B) Sodium Thiosulfate
(C) Coolomatic (D) Phenol red
Correct Answer: (D) Phenol red
‣ When should you backwash high rate sand filters that have a single pressure
gauge?
(A) After an 8 to 10 psi increase above starting pressure
(B) Every 2 days
(C) Once per week (D) When the influent and effluent gauges are 10 to 20 psi
apart -✓✓(A) After an 8 to 10 psi increase above starting pressure
Question 7.
Oxidation Reduction Potential testing (ORP) is measured in:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm) (D) Free available chlorine (FAC)
Correct Answer: (B) Millivolts (mV)
Question 8.
How much sodium thiosulfate would you need to lower the free chlorine from 18 ppm to
2.0 ppm in a 150,000 gallon pool?
(A) 35 lbs.
(B) 30 lbs.
(C) 25 lbs. (D) 39 lbs.
Correct Answer: (D) 39 lbs.
Question 9.
Evaporation heat losses from a pool are highest under which environmental condition?
(A) High relative humidity (B) Low relative humidity
(C) Clear sky (D) Low barometric pressure
Correct Answer: (B) Low relative humidity
Question 10.
The daily opening checklist should be used to:
(A) Check the design of the facility
(B) Ensure all safety equipment is in place
(C) Check that all ground wires are properly connected (D) Ensure the heater is properly
sized
Correct Answer: (B) Ensure all safety equipment is in place
