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Environmental Engineering in CE

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

500
5
1
50

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Environmental Engineering in CE
Which of the following is the most major constituents of air pollutants?

Carbon monoxide
Oxides of nitrogen
Hydrogen sulphide
Oxides of sulphur

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

Sedimentation
Sterilisation
Disinfection
Coagulation

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Environmental Engineering in CE
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the

Vegetation
Green house effect
Forestation
Rain

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Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Ionosphere
Green house
Atmospheric effect
Global warming

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Environmental Engineering in CE
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.

2
332
1050
42

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