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Environmental Engineering in CE

Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Tanneries
Beverages
Glass & ceramic
Any of these

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Environmental Engineering in CE
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.

6000 to 9000
1000 to 2000
3000 to 6000
10000 to 100000

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Environmental Engineering in CE
__________ is the process of killing organism in water.

Coagulation
Disinfection
Sedimentation
Sterilisation

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Environmental Engineering in CE
What are the methods of treatment & disposal of radioactive wastes?

Evaporation & chemical precipitation
All of these
Fixing into a solid mass with cement and sinking deep in the sea
Biological methods & adsorption in ion exchange materials

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Environmental Engineering in CE
Main pollutants released from petroleum refineries is

CO, SO₂ & H₂S
CO₂, H₂S & NO₂
CO₂, NO & SO₃
SO₃, NO₂ & CO₂

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Environmental Engineering in CE
A shallow pond in which the sewage is retained and biologically treated is called

Skimming tank
Oxidation
Imhoff tank
Lagoon

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