Discussion :: UPSC Civil Service Exam Questions
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Which one of the following statements is not correct ?
A.
Settling and sludge digestion occur in septic tanks in one compartment
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B.
Settling and sludge digestion occur in Imhoff tank in different compartments
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C.
Septic tank is a low-rate anaerobic unit whereas an Imhoff tank is a high rate anaerobic unit
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D.
The rate of sludge accumulation in septic tank is approximately 40-70 litres/capita/year
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