AFO (Aquatics Facilitator Operator)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
A commonly use chemical compound dosed into swimming
pools that releases hydrogen ions in water thereby lowering
pH - Correct Answers ✅Acid
a simple nuisance plant life that colonizes in water under
favorable conditions - Correct Answers ✅Algae
A measure of the pH-buffering capacity of water - Correct
Answers ✅Alkalinity
Alum; a flocculating agent frequently used as a supplement
in rapid sand filters only! - Correct Answers ✅Aluminum
Sulfate
A chemical compound of hydrogen and nitrogen that
combines with free chlorine in pools to form chloramines, or
combined chlorine. - Correct Answers ✅Ammonia (NH3)
Electronic equipment that senses water variables (primarliy
chlorine, ORP, temperature, and pH) and controls chemical
feeder or heater systems to maintain desired levels. -
Correct Answers ✅Automation
The process of cleaning a swimming pool filter by reversing
the flow of water through it. - Correct Answers ✅Backwash
,AFO (Aquatics Facilitator Operator)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
In pools, use to refer to a condition of the water that is
neither scaling nore aggressive/corrosive. - Correct Answers
✅Balance
Opposite of acidic, a pH condition above 7. - Correct
Answers ✅Basic
Sodium hypochlorite, usually 12% strength, "liquid chlorine"
for pool use. - Correct Answers ✅Bleach (NaCIO)
Biatomaceous earth contimuously added to filter elements
during the course of a filter run to help maintain filter efficacy
and extend filter runs. - Correct Answers ✅Body Coat
(Body Feed)
The point in a rising chlorine residual at which the
concentration of available chlorine becomes great enough to
oxidize most organiz matter, chloramines, and ammonia
compounds in a pool. Chlorine added thereafter will be in the
uncombined, or free, state. - Correct Answers ✅Breakpoint
(Chlorination)
a heavy, dark-reddish-brown liquid in the same chemical
family as chlorine gas. It is sometimes used as a bactericide
, AFO (Aquatics Facilitator Operator)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
in pools, usually in a solid-compound or salt form. - Correct
Answers ✅Bromine (Br2)
Formation of calcium carbonate on walls of pools or pipes, or
in a filter or heater, due to precipitation of calcium carbonate.
- Correct Answers ✅Calcification (see also Scale)
Compound of chlorine and calcium used in white granular or
tablet form as a disinfectant in pools. Typically, 65% chlorine
by weight and a pH of ~11 in water. - Correct Answers
✅Calcium Hypochlorite {Ca(CIO)2}
Derived from the Langelier Index, for determining water's
tendency to scale or be aggressive. Sometimes known at the
LSI or SI. - Correct Answers ✅Calcium Saturation Index
(CSI)
common gas found in air; exhaled in human breath. Forms of
carbonic acid when dissolved in water and contributes to
bicarbonate alkalinity when added to water, thereby lowering
pH and raising alkalinity. - Correct Answers ✅Carbon
Dioxide (CO2)
See "Sodium Hydroxide" - Correct Answers ✅Caustic Soda
(NaOH)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
A commonly use chemical compound dosed into swimming
pools that releases hydrogen ions in water thereby lowering
pH - Correct Answers ✅Acid
a simple nuisance plant life that colonizes in water under
favorable conditions - Correct Answers ✅Algae
A measure of the pH-buffering capacity of water - Correct
Answers ✅Alkalinity
Alum; a flocculating agent frequently used as a supplement
in rapid sand filters only! - Correct Answers ✅Aluminum
Sulfate
A chemical compound of hydrogen and nitrogen that
combines with free chlorine in pools to form chloramines, or
combined chlorine. - Correct Answers ✅Ammonia (NH3)
Electronic equipment that senses water variables (primarliy
chlorine, ORP, temperature, and pH) and controls chemical
feeder or heater systems to maintain desired levels. -
Correct Answers ✅Automation
The process of cleaning a swimming pool filter by reversing
the flow of water through it. - Correct Answers ✅Backwash
,AFO (Aquatics Facilitator Operator)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
In pools, use to refer to a condition of the water that is
neither scaling nore aggressive/corrosive. - Correct Answers
✅Balance
Opposite of acidic, a pH condition above 7. - Correct
Answers ✅Basic
Sodium hypochlorite, usually 12% strength, "liquid chlorine"
for pool use. - Correct Answers ✅Bleach (NaCIO)
Biatomaceous earth contimuously added to filter elements
during the course of a filter run to help maintain filter efficacy
and extend filter runs. - Correct Answers ✅Body Coat
(Body Feed)
The point in a rising chlorine residual at which the
concentration of available chlorine becomes great enough to
oxidize most organiz matter, chloramines, and ammonia
compounds in a pool. Chlorine added thereafter will be in the
uncombined, or free, state. - Correct Answers ✅Breakpoint
(Chlorination)
a heavy, dark-reddish-brown liquid in the same chemical
family as chlorine gas. It is sometimes used as a bactericide
, AFO (Aquatics Facilitator Operator)
Glossary EXAM QUESTIONS AND
ANSWERS 100% SOLVED (Newest 2025)
in pools, usually in a solid-compound or salt form. - Correct
Answers ✅Bromine (Br2)
Formation of calcium carbonate on walls of pools or pipes, or
in a filter or heater, due to precipitation of calcium carbonate.
- Correct Answers ✅Calcification (see also Scale)
Compound of chlorine and calcium used in white granular or
tablet form as a disinfectant in pools. Typically, 65% chlorine
by weight and a pH of ~11 in water. - Correct Answers
✅Calcium Hypochlorite {Ca(CIO)2}
Derived from the Langelier Index, for determining water's
tendency to scale or be aggressive. Sometimes known at the
LSI or SI. - Correct Answers ✅Calcium Saturation Index
(CSI)
common gas found in air; exhaled in human breath. Forms of
carbonic acid when dissolved in water and contributes to
bicarbonate alkalinity when added to water, thereby lowering
pH and raising alkalinity. - Correct Answers ✅Carbon
Dioxide (CO2)
See "Sodium Hydroxide" - Correct Answers ✅Caustic Soda
(NaOH)
