POOL OPERATOR FINAL PAPER
QUESTIONS AND SOLUTIONS
◉ what is the CT value for crypto
Answer: 15,300
◉ hypochlorous acid (HCl)
Answer: -inactivates pathogens and alage
-oxidizes
-the active killing form of chlorine in water
◉ free chlorine
Answer: the active available disinfectant in the water
FC= HoCl + OCl-
◉ combined chlorine
Answer: forms when free chlorine reacts with 2 types of
contaminants in the water
◉ pathogens
Answer: bacteria, fungi, viruses and protozoan parasites
◉ available chlorine content (acc)
,Answer: -comparison of the relative amount of chlorine released
into water for different chlorine disinfectants
-developed using chlorine gas as the standard reference of 100%
◉ active chlorine percentage
Answer: the percentage by weight of the technical grade active
ingredient in the product
◉ how does sodium hypochlorite raise the water's Total Dissolved
Solids?
Answer: by adding sodium (Na+) and chloride (Cl-) ions to the
water
◉ sodium hypochlorite (NaOCl)
Answer: -liquid chlorine releasing disinfectant that is the most
common disinfectant used
-active strength: 10-12%
-ACC 10-12%
-pH 9-14
◉ calcium hypochlorite is used to
Answer: superchlorinate the water
◉ calcium hypochlorite
Answer: -dry form of chlorine
, -class 3 oxidizer
-continuous use may result in high calcium levels
-pH 8.5-11
◉ lithium hypochlorite (LiOCl)
Answer: -dry, granular compound of chlorine
-rapidly and completely soluble
-use for superchlorination
-class 1 oxidezer
◉ chlorine generation
Answer: in line generation
brine method
◉ chlorine gas
Answer: -effective disinfectant
-active strength 100%
-ACC 100%
-pH 0
◉ cyanuric acid (CyA)
Answer: -aka conditioner/stabilizer
-added directly or indirectly via stabilized chlorine products
QUESTIONS AND SOLUTIONS
◉ what is the CT value for crypto
Answer: 15,300
◉ hypochlorous acid (HCl)
Answer: -inactivates pathogens and alage
-oxidizes
-the active killing form of chlorine in water
◉ free chlorine
Answer: the active available disinfectant in the water
FC= HoCl + OCl-
◉ combined chlorine
Answer: forms when free chlorine reacts with 2 types of
contaminants in the water
◉ pathogens
Answer: bacteria, fungi, viruses and protozoan parasites
◉ available chlorine content (acc)
,Answer: -comparison of the relative amount of chlorine released
into water for different chlorine disinfectants
-developed using chlorine gas as the standard reference of 100%
◉ active chlorine percentage
Answer: the percentage by weight of the technical grade active
ingredient in the product
◉ how does sodium hypochlorite raise the water's Total Dissolved
Solids?
Answer: by adding sodium (Na+) and chloride (Cl-) ions to the
water
◉ sodium hypochlorite (NaOCl)
Answer: -liquid chlorine releasing disinfectant that is the most
common disinfectant used
-active strength: 10-12%
-ACC 10-12%
-pH 9-14
◉ calcium hypochlorite is used to
Answer: superchlorinate the water
◉ calcium hypochlorite
Answer: -dry form of chlorine
, -class 3 oxidizer
-continuous use may result in high calcium levels
-pH 8.5-11
◉ lithium hypochlorite (LiOCl)
Answer: -dry, granular compound of chlorine
-rapidly and completely soluble
-use for superchlorination
-class 1 oxidezer
◉ chlorine generation
Answer: in line generation
brine method
◉ chlorine gas
Answer: -effective disinfectant
-active strength 100%
-ACC 100%
-pH 0
◉ cyanuric acid (CyA)
Answer: -aka conditioner/stabilizer
-added directly or indirectly via stabilized chlorine products
