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Environmental Engineering

Environmental Engineering
The characteristics of fresh and septic sewage respectively are

Alkaline and acidic
Acidic and alkaline
Both alkaline
Both acidic

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Environmental Engineering
The detention period for oxidation ponds is usually kept as

48 hours
3 months
10 to 15 days
24 hours

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Environmental Engineering
The velocity of flow does not depend on

Roughness of sewer
Hydraulic mean depth of sewer
Grade of sewer
Length of sewer

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Environmental Engineering
The effect of increasing diameter of sewer on the self cleansing velocity is

Fluctuating
To decrease it
Nil
To increase it

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Environmental Engineering
The maximum discharge of a tube well is about

5 liters/sec
500 liters/sec
1000 liters/sec
50 liters/sec

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Environmental Engineering
The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

40 ppm
1 ppm
10 ppm
4 ppm

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MORE MCQ ON Environmental Engineering

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