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Environmental Engineering in CE

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

Hydrogen sulphide
Oxides of nitrogen
Oxides of sulphur
Carbon monoxide

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Environmental Engineering in CE
Presence of nitrates in water in excess of 50 ppm causes

Gastroentetitis
Tooth decay
Mathenoglobenemia
Asphyxiation

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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.

42
332
2
1050

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Environmental Engineering in CE
Green house effect is accentuated by

Deforestation
Increased transportation activity
Rapid industrialisation
All of these

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Environmental Engineering in CE
Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called

Dust
Smoke
Powder
Grit

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Environmental Engineering in CE
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).

Ozone
MIC (methyl iso-cynate)
Phosgene
Bromine

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