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Environmental Engineering in CE

Environmental Engineering in CE
Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause

Undesirable plant growth
Non biodegradable foam
Explosion
Corrosion

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Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

Photochemical oxidation of organic matter
Biological decay of vegetable matter
None of these
Volcanic eruptions and lightening discharges

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Environmental Engineering in CE
Presence of nitrates in water in excess of 50 ppm causes

Asphyxiation
Tooth decay
Mathenoglobenemia
Gastroentetitis

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Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

10
250
1
1000

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Environmental Engineering in CE
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

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

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Environmental Engineering in CE
Average human body contains about __________ percent water by weight.

70
40
20
85

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