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ENVIRONMENTAL ENGINEERING

Environmental Engineering
A pipe which is installed in the house drainage to preserve the water seal of traps is called

Vent pipe
Soil pipe
Waste pipe
Anti-siphonage pipe

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Environmental Engineering
If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test

Only (i)
All (i), (ii) and (iii)
Both (i) and (iii)
Both (i) and (ii)

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

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

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Environmental Engineering
As compared to geometrical increase method of forecasting population, arithmetical increase method gives

Accurate value
Lesser value
Same value
Higher value

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Environmental Engineering
For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be

Partially separate system
Partially combined system
Combined system
Separate system

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