This quiz assesses knowledge on water treatment processes focusing on iron and manganese removal. It covers topics like health effects, treatment methods, and chemical oxidation, essential for operators in training.
True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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Black
Blue-green
Orange
Rust
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Because algae growth takes up iron and manganese
Because iron and manganese are bound up in ground-water
Because iron and manganese react with dissolved oxygen to from insoluble compounds
Because precipitation collects iron and manganese in the atmosphere
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As close to the well or other source as possible
At the entrance to the distribution system
At the far end of the distribution system
From a sampling tap at the laboratory
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To comply with drinking water regulations
To control the release of flavors and odors
To co-precipitate the iron
To prevent the growth of iron bacteria
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To keep out disinfection byproduct
To keep out rain, stormwater runoff, rodents,and insects
To keep out sunlight
To prevent evaporation losses.
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By exchanging iron and manganese for other ions
By filtering out the iron and manganese
By forming insoluble oxides
By forming soluble oxides
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To be sure that ion flavors and odors are not present
To be sure the iron is in the ferric state
To be sure the iron is in the ferrous state
To be sure there is no rust present in the water
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Clarifier
Comminutor
Filter
Mixer
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Avoids producing flavors and odors
Maintains a free, loose, and fluid condition
Retains green color
Stays aerobic
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Alternate source
Oxidation by aeration
Oxidation with permangante
Phosphate treatment
Removal by ion exhange
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Flows
Hardness
Organic Substances
PH
Temperature
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Hydrogen sulfide
Sodium bisulfite
Sodium Chloride
Sodium Sulfite
Sulfur Dioxide
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Backwash rate is lower
Effluent color is clearer
Filtration rate is slower
Run time is shorter
Sand is finer than conventional filter sand
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Alkalinity
Coliforms
Hardness
Iron
Sulfide
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In a sanitary sewer
In a storm drain
Sent to a drying bed
Sent to a lake
Sent to a river
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Excessive pressure drop across bed immediately after backwashing
Filter effluent clear, But manganese higher than raw water
Filter effluent turbid with yellow to brownish color
Iron low and manganese low
On multiple unit installations, water quality good on some units, but bad on other units.
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