POOL OPERATORS EXAM QUESTIONS
AND ANSWERS
Chemical name for liquid Chlorine - Answer-Sodium hypochlorite
Ideal level for Chlorine - Answer-1-4 ppm
Is the pH for liquid Chlorine high or low? - Answer-high, add acid to bring back down
What is Hypochlorous acid? - Answer-a strong oxidizer known as Free Available
Chlorine
What is FAC? - Answer-Free Available Chlorine
Chemical name for solid Chlorine - Answer-Calcium hypochlorite
What is HTH? - Answer-Another name for solid Chlorine or Calcium hypochlorite
What is Calcium hypochlorite used for? - Answer-targeted disinfections, typically on the
pool deck
What does Calcium hypochlorite do to the calcium levels? - Answer-raises the calcium
concentration
Facts about Chlorine Gas - Answer-100% FAC, causes significant safety concerns and
is barely used today
Salt Based Chlorine Generation (Salt Water Pools) - Answer-chlorine is generated from
salt through electrolysis
Advantages to Salt Based Chlorine Generation - Answer-easier to store, more gentle on
humans, reduced hazards
Disadvantages to Salt Based Chlorine Generation - Answer-harder to maintain, very
expensive but pays off in the long run
AND ANSWERS
Chemical name for liquid Chlorine - Answer-Sodium hypochlorite
Ideal level for Chlorine - Answer-1-4 ppm
Is the pH for liquid Chlorine high or low? - Answer-high, add acid to bring back down
What is Hypochlorous acid? - Answer-a strong oxidizer known as Free Available
Chlorine
What is FAC? - Answer-Free Available Chlorine
Chemical name for solid Chlorine - Answer-Calcium hypochlorite
What is HTH? - Answer-Another name for solid Chlorine or Calcium hypochlorite
What is Calcium hypochlorite used for? - Answer-targeted disinfections, typically on the
pool deck
What does Calcium hypochlorite do to the calcium levels? - Answer-raises the calcium
concentration
Facts about Chlorine Gas - Answer-100% FAC, causes significant safety concerns and
is barely used today
Salt Based Chlorine Generation (Salt Water Pools) - Answer-chlorine is generated from
salt through electrolysis
Advantages to Salt Based Chlorine Generation - Answer-easier to store, more gentle on
humans, reduced hazards
Disadvantages to Salt Based Chlorine Generation - Answer-harder to maintain, very
expensive but pays off in the long run