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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is not a weightless pollutant?

Radioactive rays
SPM
Noise pollution
Thermal pollution

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Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

1000
100
25
0.1

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Environmental Engineering in CE
Most of the atmospheric air pollutants are present in large quantity in

Thermosphere
Trophosphere
Stratosphere
Mesosphere

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Environmental Engineering in CE
The biological decomposition of organic substances in wastes controlled conditions is called

Biological oxidation
None of these
Composting
Incineration

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Environmental Engineering in CE
__________ plant emits large amount of SO₂ as an air pollutant.

Iron & steel
Nitric acid
Sulphuric acid
Chloralkali

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Environmental Engineering in CE
Ionisation potential employed in the industrial electrostatic precipitator is of the order of

230 V AC
230 V DC
30 to 70 kV AC
30 to 70 kV DC

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