POOL OPERATOR 2027 TEST ANSWERS AND
QUESTIONS SET A+
✔✔max temperature of a pool or spa - ✔✔104 degrees
✔✔at higher temps, there is an increased tendency for _____ - ✔✔scaling
✔✔at lower temperatures, there is an increased tendency for ______ - ✔✔corrosion
✔✔maximum total disolved solids - ✔✔1500
✔✔saturation index equation: SI= - ✔✔pH + TF + CF + AF + TDSF
✔✔green water - ✔✔presence of copper
✔✔red-brown water - ✔✔presence of iron
✔✔number one reason for cloudy water - ✔✔improper filtration
✔✔too much calcium in the water leads to - ✔✔scale
✔✔cause of foaming - ✔✔organic waste
✔✔three types of algae - ✔✔green, black, yellow
✔✔most common and most easily controlled algae - ✔✔green
✔✔algae resulting from poor pool circulation - ✔✔black
✔✔algae that is difficult to control and often requires_____ - ✔✔yellow, algaecide
, ✔✔pool capacity (in gallons) is equal to the pool _______ times _______ - ✔✔volume,
7.5 gallons
✔✔minerals that cause stains (3) - ✔✔iron, copper, manganese
✔✔chemicals used to neutralize chlorine (2) - ✔✔sodium thiosulfate, sodium sulfite
✔✔acceptable range of free chlorine in a pool: ____ to ____ppm - ✔✔1, 3
✔✔ideal chlorine in a spa - ✔✔4
✔✔what causes the chlorine smell in an indoor pool - ✔✔chloramines evaporating
✔✔what are caused by chlorine combining itself to organic maters (like ammonia)? -
✔✔chloramines
✔✔which chlorine has a pH of nine and raises the pH of water? - ✔✔liquid chlorine
✔✔_____ deteriorates quickly into exposed air - ✔✔sodium hypochlorite
✔✔When using CA to stabilize a pool the chlorine level must stay above _____ ppm -
✔✔2
✔✔how is bromine different from chlorine? - ✔✔combine bromine can be used as an
effective sanitizer
✔✔Breakpoint chlorination is an effective technique to reduce ________ which cause
_______ - ✔✔inorganic chloramines, chlorine odor
✔✔what can be performed after a pool has been drained to remove stains? - ✔✔acid
wash
✔✔what does a sequestration agent (chelating) do? - ✔✔form chemical bonds to
metals dissolving them in the water
✔✔water chemistry and increased bather load can account for _____ - ✔✔cloudiness
✔✔used as a water clarifier to help remove small particles from the pool - ✔✔flocculent
✔✔lighter, yellow color shows _____ pH - ✔✔low
✔✔brighter, pink color shows ______ pH - ✔✔high
QUESTIONS SET A+
✔✔max temperature of a pool or spa - ✔✔104 degrees
✔✔at higher temps, there is an increased tendency for _____ - ✔✔scaling
✔✔at lower temperatures, there is an increased tendency for ______ - ✔✔corrosion
✔✔maximum total disolved solids - ✔✔1500
✔✔saturation index equation: SI= - ✔✔pH + TF + CF + AF + TDSF
✔✔green water - ✔✔presence of copper
✔✔red-brown water - ✔✔presence of iron
✔✔number one reason for cloudy water - ✔✔improper filtration
✔✔too much calcium in the water leads to - ✔✔scale
✔✔cause of foaming - ✔✔organic waste
✔✔three types of algae - ✔✔green, black, yellow
✔✔most common and most easily controlled algae - ✔✔green
✔✔algae resulting from poor pool circulation - ✔✔black
✔✔algae that is difficult to control and often requires_____ - ✔✔yellow, algaecide
, ✔✔pool capacity (in gallons) is equal to the pool _______ times _______ - ✔✔volume,
7.5 gallons
✔✔minerals that cause stains (3) - ✔✔iron, copper, manganese
✔✔chemicals used to neutralize chlorine (2) - ✔✔sodium thiosulfate, sodium sulfite
✔✔acceptable range of free chlorine in a pool: ____ to ____ppm - ✔✔1, 3
✔✔ideal chlorine in a spa - ✔✔4
✔✔what causes the chlorine smell in an indoor pool - ✔✔chloramines evaporating
✔✔what are caused by chlorine combining itself to organic maters (like ammonia)? -
✔✔chloramines
✔✔which chlorine has a pH of nine and raises the pH of water? - ✔✔liquid chlorine
✔✔_____ deteriorates quickly into exposed air - ✔✔sodium hypochlorite
✔✔When using CA to stabilize a pool the chlorine level must stay above _____ ppm -
✔✔2
✔✔how is bromine different from chlorine? - ✔✔combine bromine can be used as an
effective sanitizer
✔✔Breakpoint chlorination is an effective technique to reduce ________ which cause
_______ - ✔✔inorganic chloramines, chlorine odor
✔✔what can be performed after a pool has been drained to remove stains? - ✔✔acid
wash
✔✔what does a sequestration agent (chelating) do? - ✔✔form chemical bonds to
metals dissolving them in the water
✔✔water chemistry and increased bather load can account for _____ - ✔✔cloudiness
✔✔used as a water clarifier to help remove small particles from the pool - ✔✔flocculent
✔✔lighter, yellow color shows _____ pH - ✔✔low
✔✔brighter, pink color shows ______ pH - ✔✔high
