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Environmental Engineering in CE

Environmental Engineering in CE
Solid content in most of the domestic sewage is about __________ percent.

10
0.001
5
0.1

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Environmental Engineering in CE
The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is

(i) and (ii)
(ii) and (iii)
(ii) and (iv)
(i)and(iv)

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Environmental Engineering in CE
The main industrial source of emission of hydrogen sulphide air pollutant is

Petroleum refineries
Coal based thermal power plants
Pulp and paper plant
Metallurgical roasting & smelting plant

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Environmental Engineering in CE
TLV of lead for public sewer/waste water is about __________ ppm.

150
1
25
650

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Environmental Engineering in CE
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the

Both B and C
Green house effect
Catalytic conversion
Global warming

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Environmental Engineering in CE
The upper layer of atmosphere is called the

None of these
Stratosphere
Ionosphere
Troposphere

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