WASTEWATER TREATMENT LEVEL 1 CERTIFICATION QUESTIONS AND CORRECT ANSWERS

WASTEWATER TREATMENT LEVEL 1
CERTIFICATION QUESTIONS AND
CORRECT ANSWERS

In most activated sludge plants, the waste activated sludge is pumped to waste sludge
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handling facilities - ans-True ws ws ws




A primary clarifier is used after a trickling filter to settle out sloughing's from the filter m
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edia - ans-False
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pH general will be affected significantly by a clarifier - ans-False
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When starting a trickling filter, slime growth will start to develop on the filter media imm
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ediately - ans-False ws ws




Rotating Biological Contactors have few moving parts and require minor amounts of pr
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eventative maintenance - ans-True ws ws ws




Since the oxidation ditch is operated as a closed system, the amount of volatile suspen
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ded solids will gradually decrease - ans-True
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Ponds have a consistently high quality effluent - ans-False
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Typical disease causing microorganisms include bacteria, viruses and parasites - ans-
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True

Sulphur dioxide is extremely hazardous and must be handled with caution - ans-True
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Algae in ponds use carbon dioxide and bicarbonates to build body protoplasm - ans-
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True

Which treatment units in a wastewater treatment plant are designed and operated to re
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move sludge and scum? - ans-Primary treatment units
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What is the purpose of free aeration? - ans-
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To freshen the water and to separate oils and grease
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