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Environmental Engineering in CE

Environmental Engineering in CE
Main pollutants released from iron & steel industry is

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

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Environmental Engineering in CE
Which of the following is the most detrimental for water used in high pressure boiler?

Phenol
Dissolved oxygen
Turbidity
Silica

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Environmental Engineering in CE
Which is the most widely used coagulant for the treatment of turbid water?

Alum (aluminium sulphate)
Sodium aluminate
Lime
Ferric chloride

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Environmental Engineering in CE
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

SO₂
Hg
NOx
F

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Environmental Engineering in CE
Radioactive solid nuclear wastes are disposed off by

Pyrolysis
Underground burial in concrete containers
High temperature incineration
Pathological incineration

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Environmental Engineering in CE
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.

5
50
500
1

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