Certified Pool Operator
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. The percentage of hypoclorous acid formation is most influenced by:
- Correct Answer: pH
2. Pool painting is usually done: - Correct Answer: Before opening in the
spring
3. When a pool is chlorinated with gas chlorine, the operator must also use: -
Correct Answer: Soda Ash
4. The term "chlorine demand" refers to: - Correct Answer: The amount of
chlorine which will react with substances in the pool
5. Re-circulation pumps used in swimming pools are the type called: -
Correct Answer: Centrifugal pumps
6. Reversing the flow of water through the filters is called: - Correct
Answer: Backwash
,7. "Slurry feed" or "body feed" refers to: - Correct Answer: Diatomite
added during a filter run
8. The term pH is determined by the concentration of: - Correct Answer:
Hydrogen ions
9. Because carbonate ions combine with hydrogen ions, sodium carbonate will
cause pH to: - Correct Answer: Rise
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: - Correct Answer: Break-point
11."Residual chlorine" refers to: - Correct Answer: The amount left in the
water after oxidation of organic material
12.Which of the following is NOT considered a swimming pool disinfectant: -
Correct Answer: Chlorinated hydrocarbons
13.When chlorine is used as a disinfectant for swimming pools, the form in
which it's disinfectant properties are the greatest is: - Correct Answer:
Hypochlorous acid
,14.The chemical most commonly used to raise pH is: - Correct Answer:
Sodium carbonate
15.An example of a chemical used to stabilize chlorine is: - Correct Answer:
Cyanuric acid
16.The chemical reagent recommended by the health department to test
chlorine residual in swimming pools is: - Correct Answer: D.P.D.
17.The chemical reagent used most often to test pH in swimming pools is: -
Correct Answer: Phenol red
18.Considering all factors, which of the following would be the BEST range for
pH in a swimming pool: - Correct Answer: 7.2-7.8
19.The minimum turnover rate to obtain 100% clarity in a pool is: - Correct
Answer: Once in eight hours
20.There is a noticeable odor of chlorine around your pool and bathers are
complaining of eye irritation. Which of the following is most likely to solve
the problem: - Correct Answer: Break point chlorination
21.As pH increases, chlorine effectiveness: - Correct Answer: Decreases
, 22.In a high-rate sand filter system, the tanks are backwashed: - Correct
Answer: All at once
23.The baffle in the filter tank is there to: - Correct Answer: Disperse water
evenly over the surface of the filter media
24.An access manhole is constructed on each tank in sand and anthracite filter
systems: - Correct Answer: All of the above
25.A hair and lint strainer should be located: - Correct Answer: Before the
pump and before the filter
26.Sodium hypochlorite used as a pool sanitizer also affects the water pH in
the following manner: - Correct Answer: Raises
27.Chlorine gas will ________ the pH: - Correct Answer: Lower
28.DE systems should be turned off for a "rest": - Correct Answer: Never
29.If the filter run is started with clean filters, the difference between the
influent and effluent gauges should be: - Correct Answer: Very little
30.Glass containers are: - Correct Answer: Never allowed in the pool
enclosure
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. The percentage of hypoclorous acid formation is most influenced by:
- Correct Answer: pH
2. Pool painting is usually done: - Correct Answer: Before opening in the
spring
3. When a pool is chlorinated with gas chlorine, the operator must also use: -
Correct Answer: Soda Ash
4. The term "chlorine demand" refers to: - Correct Answer: The amount of
chlorine which will react with substances in the pool
5. Re-circulation pumps used in swimming pools are the type called: -
Correct Answer: Centrifugal pumps
6. Reversing the flow of water through the filters is called: - Correct
Answer: Backwash
,7. "Slurry feed" or "body feed" refers to: - Correct Answer: Diatomite
added during a filter run
8. The term pH is determined by the concentration of: - Correct Answer:
Hydrogen ions
9. Because carbonate ions combine with hydrogen ions, sodium carbonate will
cause pH to: - Correct Answer: Rise
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: - Correct Answer: Break-point
11."Residual chlorine" refers to: - Correct Answer: The amount left in the
water after oxidation of organic material
12.Which of the following is NOT considered a swimming pool disinfectant: -
Correct Answer: Chlorinated hydrocarbons
13.When chlorine is used as a disinfectant for swimming pools, the form in
which it's disinfectant properties are the greatest is: - Correct Answer:
Hypochlorous acid
,14.The chemical most commonly used to raise pH is: - Correct Answer:
Sodium carbonate
15.An example of a chemical used to stabilize chlorine is: - Correct Answer:
Cyanuric acid
16.The chemical reagent recommended by the health department to test
chlorine residual in swimming pools is: - Correct Answer: D.P.D.
17.The chemical reagent used most often to test pH in swimming pools is: -
Correct Answer: Phenol red
18.Considering all factors, which of the following would be the BEST range for
pH in a swimming pool: - Correct Answer: 7.2-7.8
19.The minimum turnover rate to obtain 100% clarity in a pool is: - Correct
Answer: Once in eight hours
20.There is a noticeable odor of chlorine around your pool and bathers are
complaining of eye irritation. Which of the following is most likely to solve
the problem: - Correct Answer: Break point chlorination
21.As pH increases, chlorine effectiveness: - Correct Answer: Decreases
, 22.In a high-rate sand filter system, the tanks are backwashed: - Correct
Answer: All at once
23.The baffle in the filter tank is there to: - Correct Answer: Disperse water
evenly over the surface of the filter media
24.An access manhole is constructed on each tank in sand and anthracite filter
systems: - Correct Answer: All of the above
25.A hair and lint strainer should be located: - Correct Answer: Before the
pump and before the filter
26.Sodium hypochlorite used as a pool sanitizer also affects the water pH in
the following manner: - Correct Answer: Raises
27.Chlorine gas will ________ the pH: - Correct Answer: Lower
28.DE systems should be turned off for a "rest": - Correct Answer: Never
29.If the filter run is started with clean filters, the difference between the
influent and effluent gauges should be: - Correct Answer: Very little
30.Glass containers are: - Correct Answer: Never allowed in the pool
enclosure
