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Environmental Engineering

Environmental Engineering
Composting and lagooning are the methods of

Filtration
Sludge digestion
Sludge disposal
Sedimentation

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Environmental Engineering
The ratio of 5 day BOD to ultimate BOD is about

43833
1
43864
43894

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Environmental Engineering
For normal sludge, the value of sludge index for Indian conditions is

0 to 50
350 to 500
150 to 350
50 to 150

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Environmental Engineering
The layout of distribution system in which water flows towards the outer periphery is

Dead end system
Ring system
Grid iron system
Radial system

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

To decrease it
Fluctuating
To increase it
Nil

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Environmental Engineering
The maximum discharge of a tube well is about

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

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