CPO TEST QUESTIONS WITH CORRECT
ANSWERS
The percentage of hypo-chlorous acid formation is most influenced by: - Answer-(b) pH
3. What chemical is used to raise alkalinity in pool water? - Answer-a) Sodium
bicarbonate
4. The term "chlorine demand" refers to: - Answer-(c) The amount of chlorine which will
react with substances in the pool
6. Reversing the flow of water through the filters is called: - Answer-(d) Backwash
8. Emergency Action Plans EAP contain the following Except:(a) Know all alarms. (b)
Regular in-service training (c) Know the emergency signs (d) Facilities open/close list -
Answer-(d) Facilities open/close list
9. Which of the following are forms of entrapment? - Answer-(d) All of the above
10. When enough chlorine is added to cause complete oxidation of all organic
compounds a sudden drop in residual chlorine may be noticed. The point at which this
occurs is called the: - Answer-(d) breakpoint chlorination
11. "Residual chlorine" refers to: - Answer-(b) The usable amount left in the water after
oxidation of organic material
12. Which of the following is NOT considered a swimming pool disinfectant: - Answer-
(b) Chlorinated hydrocarbons
13. What is the primary reason for using cyan-uric acid?(a) Protect chlorine from
sunlight (b) Lower pH (c) Raise pH (d) Lower chlorine - Answer-(a) Protect chlorine from
sunlight
14. The chemical most commonly used to raise pH is: - Answer-(c) Sodium carbonate
15. An example of a chemical used to stabilize chlorine is: - Answer-(b) Cyan-uric acid
16. The chemical reagent recommended by the health department to test chlorine
residual in swimming pools is: - Answer-(b) DPD
17. The chemical reagent used most often to test pH in swimming pools is: - Answer-(c)
Phenol Red
ANSWERS
The percentage of hypo-chlorous acid formation is most influenced by: - Answer-(b) pH
3. What chemical is used to raise alkalinity in pool water? - Answer-a) Sodium
bicarbonate
4. The term "chlorine demand" refers to: - Answer-(c) The amount of chlorine which will
react with substances in the pool
6. Reversing the flow of water through the filters is called: - Answer-(d) Backwash
8. Emergency Action Plans EAP contain the following Except:(a) Know all alarms. (b)
Regular in-service training (c) Know the emergency signs (d) Facilities open/close list -
Answer-(d) Facilities open/close list
9. Which of the following are forms of entrapment? - Answer-(d) All of the above
10. When enough chlorine is added to cause complete oxidation of all organic
compounds a sudden drop in residual chlorine may be noticed. The point at which this
occurs is called the: - Answer-(d) breakpoint chlorination
11. "Residual chlorine" refers to: - Answer-(b) The usable amount left in the water after
oxidation of organic material
12. Which of the following is NOT considered a swimming pool disinfectant: - Answer-
(b) Chlorinated hydrocarbons
13. What is the primary reason for using cyan-uric acid?(a) Protect chlorine from
sunlight (b) Lower pH (c) Raise pH (d) Lower chlorine - Answer-(a) Protect chlorine from
sunlight
14. The chemical most commonly used to raise pH is: - Answer-(c) Sodium carbonate
15. An example of a chemical used to stabilize chlorine is: - Answer-(b) Cyan-uric acid
16. The chemical reagent recommended by the health department to test chlorine
residual in swimming pools is: - Answer-(b) DPD
17. The chemical reagent used most often to test pH in swimming pools is: - Answer-(c)
Phenol Red
