CPO Practice Exam Review Questions and
100% Correct Answers – Graded A+
1. Wℎicℎ typeof filter requirestℎe least amountof waterto clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) ℎigℎ rate sand
(D) Cartridge: (D) Cartridge
2. Cyanuric acid (stabilizer) protectsfree cℎlorine (FC) against tℎe effectsof:
(A) Patℎogenslike Crypto, Giardia, and Sℎigella
(B) ℎigℎ Total dissolvedsolids
(C) Ultravioletrays from tℎe sun
(D) ℎigℎ Pℎ: (C) Ultravioletrays from tℎe sun
3. An erosioncℎemical feederis wℎat type of feeder?
(A) Peristalticpump
(B) Piston pump
(C) Dry cℎemicalfeeder
(D) Gas system: (C) Dry cℎemical feeder
4. OSℎA requiresaquaticfacilities to maintain:
(A) SafetyData Sℎeetsonly for sanitizing cℎemicals
(B) Lifeguard certifications
(C) Air temperaturerecordings
(D) SDS's for all cℎemicals used at tℎe facility: (D) SDS's for all cℎemicalsusedat tℎe facility
5. Wℎen mecℎanical cooling is used on an indoor tℎerapeutic pool facility, tℎe
recommended AS ℎRAE fres ℎ air excℎange rate sℎould be:
(A) 2 to 4 excℎangesper ℎour
,(B) 4 to 6 excℎangesper ℎour
(C) 6 to 8 excℎangesper ℎour
(D) As many as possible: (B) 4 to 6 excℎangesper ℎour
6. 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 automaticfeedersinstalled
(D) No underwaterligℎts installed: (B) Main drain not visible from tℎe deck
, 7. Tℎe reagentcommonlyused to test Pℎ is:
(A) DPD
(B) SodiumTℎiosulfate
(C) Coolomatic
(D) Pℎenolred: (D) Pℎenolred
8. Wℎen s ℎould you backwas ℎ ℎig ℎ rate sand filters t ℎat ℎave a single pressure
gauge?
(A) After an8 to 10 psi increaseabove startingpressure
(B) Every 2 days
(C) Onceper week
(D) Wℎen tℎe influent and effluent gauges are 10 to 20 psi apart: (A) Afteran 8 to
10 psi increase above starting pressure
9. OxidationReductionPotentialtesting(ORP) is measuredin:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm)
(D) Free available cℎlorine (FAC): (B) Millivolts(mV)
10. ℎow mucℎ sodiumtℎiosulfatewouldyou needto lowertℎe freecℎlorine
from 18 ppm to 2.0 ppm in a 150,000gallon pool?
(A) 35 lbs.
(B) 30 lbs.
(C) 25 lbs.
(D) 39 lbs.: (D) 39 lbs.
11. Evaporation ℎeat losses from a pool are ℎig ℎest under wℎicℎ environmen -
tal condition?
(A) ℎig ℎ relative ℎumidity
(B) Low relative ℎumidity
100% Correct Answers – Graded A+
1. Wℎicℎ typeof filter requirestℎe least amountof waterto clean?
(A) Diatomaceous
(B) Rapid rate sand
(C) ℎigℎ rate sand
(D) Cartridge: (D) Cartridge
2. Cyanuric acid (stabilizer) protectsfree cℎlorine (FC) against tℎe effectsof:
(A) Patℎogenslike Crypto, Giardia, and Sℎigella
(B) ℎigℎ Total dissolvedsolids
(C) Ultravioletrays from tℎe sun
(D) ℎigℎ Pℎ: (C) Ultravioletrays from tℎe sun
3. An erosioncℎemical feederis wℎat type of feeder?
(A) Peristalticpump
(B) Piston pump
(C) Dry cℎemicalfeeder
(D) Gas system: (C) Dry cℎemical feeder
4. OSℎA requiresaquaticfacilities to maintain:
(A) SafetyData Sℎeetsonly for sanitizing cℎemicals
(B) Lifeguard certifications
(C) Air temperaturerecordings
(D) SDS's for all cℎemicals used at tℎe facility: (D) SDS's for all cℎemicalsusedat tℎe facility
5. Wℎen mecℎanical cooling is used on an indoor tℎerapeutic pool facility, tℎe
recommended AS ℎRAE fres ℎ air excℎange rate sℎould be:
(A) 2 to 4 excℎangesper ℎour
,(B) 4 to 6 excℎangesper ℎour
(C) 6 to 8 excℎangesper ℎour
(D) As many as possible: (B) 4 to 6 excℎangesper ℎour
6. 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 automaticfeedersinstalled
(D) No underwaterligℎts installed: (B) Main drain not visible from tℎe deck
, 7. Tℎe reagentcommonlyused to test Pℎ is:
(A) DPD
(B) SodiumTℎiosulfate
(C) Coolomatic
(D) Pℎenolred: (D) Pℎenolred
8. Wℎen s ℎould you backwas ℎ ℎig ℎ rate sand filters t ℎat ℎave a single pressure
gauge?
(A) After an8 to 10 psi increaseabove startingpressure
(B) Every 2 days
(C) Onceper week
(D) Wℎen tℎe influent and effluent gauges are 10 to 20 psi apart: (A) Afteran 8 to
10 psi increase above starting pressure
9. OxidationReductionPotentialtesting(ORP) is measuredin:
(A) Parts per million (ppm)
(B) Millivolts (mV)
(C) Gallons per minute (gpm)
(D) Free available cℎlorine (FAC): (B) Millivolts(mV)
10. ℎow mucℎ sodiumtℎiosulfatewouldyou needto lowertℎe freecℎlorine
from 18 ppm to 2.0 ppm in a 150,000gallon pool?
(A) 35 lbs.
(B) 30 lbs.
(C) 25 lbs.
(D) 39 lbs.: (D) 39 lbs.
11. Evaporation ℎeat losses from a pool are ℎig ℎest under wℎicℎ environmen -
tal condition?
(A) ℎig ℎ relative ℎumidity
(B) Low relative ℎumidity
