CPO Actual Exam Questions and
Answers Latest Versions 2025 Top
Rated A+
Which type of filter requires the least amount of water to clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) High rate sand
(D) Cartridge - Correct Answer-(D) Cartridge
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
1 | Page
,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
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
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
What condition mandates an immediate closure of your swimming pool?
(A) Locker room is not clean
2 | Page
, (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
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 - Correct
Answer-(A) After an 8 to 10 psi increase above starting pressure
Oxidation Reduction Potential testing (ORP) is measured in:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm)
3 | Page
Answers Latest Versions 2025 Top
Rated A+
Which type of filter requires the least amount of water to clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) High rate sand
(D) Cartridge - Correct Answer-(D) Cartridge
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
1 | Page
,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
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
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
What condition mandates an immediate closure of your swimming pool?
(A) Locker room is not clean
2 | Page
, (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
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 - Correct
Answer-(A) After an 8 to 10 psi increase above starting pressure
Oxidation Reduction Potential testing (ORP) is measured in:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm)
3 | Page
