The percentage of hypoclorous acid formation is most influenced by:
ANSWER
pH
When a pool is chlorinated with gas chlorine, the operator must also use:
ANSWER
Soda Ash
Pool painting is usually done:
ANSWER
Before opening in the spring
The term "chlorine demand" refers to:
ANSWER
The amount of chlorine which will react with substances in the pool
Re-circulation pumps used in swimming pools are the type called:
ANSWER
Centrifugal pumps
Reversing the flow of water through the filters is called:
ANSWER
Backwash
1
, "Slurry feed" or "body feed" refers to:
ANSWER
Diatomite added during a filter run
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to:
ANSWER
Rise
The term pH is determined by the concentration of:
ANSWER
Hydrogen ions
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
Break-point
"Residual chlorine" refers to:
ANSWER
The amount left in the water after oxidation of organic material
Which of the following is NOT considered a swimming pool disinfectant:
ANSWER
Chlorinated hydrocarbons
When chlorine is used as a disinfectant for swimming pools, the form in which it's disinfect-
ant properties are the greatest is:
ANSWER
2
ANSWER
pH
When a pool is chlorinated with gas chlorine, the operator must also use:
ANSWER
Soda Ash
Pool painting is usually done:
ANSWER
Before opening in the spring
The term "chlorine demand" refers to:
ANSWER
The amount of chlorine which will react with substances in the pool
Re-circulation pumps used in swimming pools are the type called:
ANSWER
Centrifugal pumps
Reversing the flow of water through the filters is called:
ANSWER
Backwash
1
, "Slurry feed" or "body feed" refers to:
ANSWER
Diatomite added during a filter run
Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to:
ANSWER
Rise
The term pH is determined by the concentration of:
ANSWER
Hydrogen ions
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
Break-point
"Residual chlorine" refers to:
ANSWER
The amount left in the water after oxidation of organic material
Which of the following is NOT considered a swimming pool disinfectant:
ANSWER
Chlorinated hydrocarbons
When chlorine is used as a disinfectant for swimming pools, the form in which it's disinfect-
ant properties are the greatest is:
ANSWER
2
