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Environmental Engineering in CE

Environmental Engineering in CE
Inhalation of silica dust causes a disease called

Pneumoconiosis
None of these
Silicosis
Bronchitis

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

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

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Environmental Engineering in CE
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?

Active carbon
Pulverised limestone
Silica gel
Bog iron (iron oxide)

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Environmental Engineering in CE
Hazardous/polluting chemical industries should have an 'exclusion zone' with a green belt and general public access prohibited around it, covering a radius of ____ metres.

400
100
4000
1000

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Environmental Engineering in CE
In water treatment plant, zeolite process is used to remove the __________ of water.

Alkalinity
Hardness
Iron & zinc
Acidity

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

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

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