CPO PRACTICE EXAM QUESTIONS AND
ANSWERS GRADED A+ 2025/2026
Which type of filter requires the least amount of water to clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) High rate sand
(D) Cartridge - ANS (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 - ANS (C) Ultraviolet rays from the sun
An erosion chemical feeder is what type of feeder?
(A) Peristaltic pump
(B) Piston pump
(C) Dry chemical feeder
(D) Gas system - ANS (C) Dry chemical feeder
OSHA requires aquatic facilities to maintain:
(A) Safety Data Sheets only for sanitizing chemicals
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, (B) Lifeguard certifications
(C) Air temperature recordings
(D) SDS's for all chemicals used at the facility - ANS (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 - ANS (B) 4 to 6 exchanges per hour
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 - ANS (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 - ANS (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
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS GRADED A+ 2025/2026
Which type of filter requires the least amount of water to clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) High rate sand
(D) Cartridge - ANS (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 - ANS (C) Ultraviolet rays from the sun
An erosion chemical feeder is what type of feeder?
(A) Peristaltic pump
(B) Piston pump
(C) Dry chemical feeder
(D) Gas system - ANS (C) Dry chemical feeder
OSHA requires aquatic facilities to maintain:
(A) Safety Data Sheets only for sanitizing chemicals
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, (B) Lifeguard certifications
(C) Air temperature recordings
(D) SDS's for all chemicals used at the facility - ANS (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 - ANS (B) 4 to 6 exchanges per hour
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 - ANS (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 - ANS (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
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
