POOL OPERATOR CORE SETS ANSWERS AND
QUESTIONS SET A+
✔✔CyA will act as a stabilizer for _______ but does not
stabilize ________ - ✔✔free chlorine, bromine
✔✔The only way to reduce CyA concentration is to _______ - ✔✔dilute the water and
replace it
✔✔whole range of bromine: ____ to _____ - ✔✔2, 10
✔✔ideal range of bromine: _____ to ______ - ✔✔4, 6
✔✔second most common disinfectant in the pool - ✔✔bromine
✔✔two types of bromine used - ✔✔sodium bromide, solid bromide
✔✔Bromine in natural form is a ______ but is in _____ form when
added to pools - ✔✔reddish brown liquid, solid
✔✔__________ is similar to hypochlorous acid - ✔✔hypobromous acid
✔✔bromine releases _____ and _____ when added to water - ✔✔hypobromite ion,
hydrogen ion
✔✔bromine will ______ pH when added to water - ✔✔lower
✔✔whole range of pH: ____to_____ - ✔✔7.2, 7.8
✔✔ideal range of pH: ____ to ____ - ✔✔7.4, 7.6
, ✔✔things that influence pH (6) - ✔✔swimmer waste, disinfectants, water source, air
borne debris, chemical balance, evaporation
✔✔low pH leads to (3) - ✔✔corrosive water, surface staining, surface etching
✔✔if you have low pH, you must add - ✔✔soda ash (caustic soda - sodium carbonate)
✔✔high pH leads to (5) - ✔✔scaling water, cloudy water, clogged filters, reduced
circulation, eye/skin irritation
✔✔if you have high pH, you must add ____ or _____ - ✔✔muriatic acid, sodium
bisulfate
✔✔whole range of total alkalinity: ____ to _____ - ✔✔60, 180
✔✔ideal range(s) of total alkalinity: ____ to _____ - ✔✔80, 120
✔✔the measure of the ability of the water to resist change in pH - ✔✔total alkalinity
✔✔acts as a pH buffer - ✔✔total alkalinity
✔✔_____ will affect total alkalinity - ✔✔cyanuric acid
✔✔if your pH is high, you will require a ______ total alkalinity - ✔✔lower
✔✔if your pH is low, it is acceptable to have a ______ total alkalinity - ✔✔higher
✔✔low total alkalinity leads to (4) - ✔✔pH bounce, heater failure, surface etching, green
water
✔✔if you have low total alkalinity, add ______ - ✔✔sodium bicarbonate
✔✔how much sodium bicarbonate should be added to increase total alkalinity? - ✔✔1.4
pounds per 10000 gal of water
✔✔high total alkalinity leads to (4) - ✔✔pH lock, cloudy waters, clogged filters, reduced
circulation
✔✔if you have high total alkalinity, add _____ or ______ - ✔✔muriatic acid, sodium
bisulfate
✔✔whole range for calcium hardness in a pool: ____ to ____ - ✔✔150, 1000
QUESTIONS SET A+
✔✔CyA will act as a stabilizer for _______ but does not
stabilize ________ - ✔✔free chlorine, bromine
✔✔The only way to reduce CyA concentration is to _______ - ✔✔dilute the water and
replace it
✔✔whole range of bromine: ____ to _____ - ✔✔2, 10
✔✔ideal range of bromine: _____ to ______ - ✔✔4, 6
✔✔second most common disinfectant in the pool - ✔✔bromine
✔✔two types of bromine used - ✔✔sodium bromide, solid bromide
✔✔Bromine in natural form is a ______ but is in _____ form when
added to pools - ✔✔reddish brown liquid, solid
✔✔__________ is similar to hypochlorous acid - ✔✔hypobromous acid
✔✔bromine releases _____ and _____ when added to water - ✔✔hypobromite ion,
hydrogen ion
✔✔bromine will ______ pH when added to water - ✔✔lower
✔✔whole range of pH: ____to_____ - ✔✔7.2, 7.8
✔✔ideal range of pH: ____ to ____ - ✔✔7.4, 7.6
, ✔✔things that influence pH (6) - ✔✔swimmer waste, disinfectants, water source, air
borne debris, chemical balance, evaporation
✔✔low pH leads to (3) - ✔✔corrosive water, surface staining, surface etching
✔✔if you have low pH, you must add - ✔✔soda ash (caustic soda - sodium carbonate)
✔✔high pH leads to (5) - ✔✔scaling water, cloudy water, clogged filters, reduced
circulation, eye/skin irritation
✔✔if you have high pH, you must add ____ or _____ - ✔✔muriatic acid, sodium
bisulfate
✔✔whole range of total alkalinity: ____ to _____ - ✔✔60, 180
✔✔ideal range(s) of total alkalinity: ____ to _____ - ✔✔80, 120
✔✔the measure of the ability of the water to resist change in pH - ✔✔total alkalinity
✔✔acts as a pH buffer - ✔✔total alkalinity
✔✔_____ will affect total alkalinity - ✔✔cyanuric acid
✔✔if your pH is high, you will require a ______ total alkalinity - ✔✔lower
✔✔if your pH is low, it is acceptable to have a ______ total alkalinity - ✔✔higher
✔✔low total alkalinity leads to (4) - ✔✔pH bounce, heater failure, surface etching, green
water
✔✔if you have low total alkalinity, add ______ - ✔✔sodium bicarbonate
✔✔how much sodium bicarbonate should be added to increase total alkalinity? - ✔✔1.4
pounds per 10000 gal of water
✔✔high total alkalinity leads to (4) - ✔✔pH lock, cloudy waters, clogged filters, reduced
circulation
✔✔if you have high total alkalinity, add _____ or ______ - ✔✔muriatic acid, sodium
bisulfate
✔✔whole range for calcium hardness in a pool: ____ to ____ - ✔✔150, 1000
