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Environmental Engineering in CE

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

Grit
Dust
Smoke
Powder

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Bone disease
Cancer
Skin disorder
Bronchitis

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Environmental Engineering in CE
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.

Hydrocarbons
Hydrogen sulphides
Hydrogen flouride
Nitrogen dioxide

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Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

25
100
0.1
1000

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

Bromine
Ozone
Phosgene
MIC (methyl iso-cynate)

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Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

None of these
Organic
Radioactive
Inorganic

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