CPO Practice EXAM Questions and
Answers Verified Solutions Latest
Update
Question:
(D) Cartridge
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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 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) -✓✓(B) Millivolts (mV) 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. -✓✓(D) 39 lbs. 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 -✓✓(B) Low relative
humidity 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 -✓✓(B) Ensure all safety
equipment is in place You have a 25,000 gallon hotel pool with a calcium hardness
level of 170 ppm. How much calcium chloride (77%) would be required to increase this
Answers Verified Solutions Latest
Update
Question:
(D) Cartridge
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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 -✓✓(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 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) -✓✓(B) Millivolts (mV) 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. -✓✓(D) 39 lbs. 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 -✓✓(B) Low relative
humidity 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 -✓✓(B) Ensure all safety
equipment is in place You have a 25,000 gallon hotel pool with a calcium hardness
level of 170 ppm. How much calcium chloride (77%) would be required to increase this
