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Environmental Engineering in CE

Environmental Engineering in CE
80% less than 200 mesh size particles are called

Aggregates
Powder
Smoke
Grit

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Environmental Engineering in CE
__________ plant emits large amount of SO₂ as an air pollutant.

Chloralkali
Nitric acid
Sulphuric acid
Iron & steel

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Environmental Engineering in CE
Polluted water having low BOD are most economically treated in

Sedimentation tanks
Oxidation ponds
Sludge digester
Clarifier

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Environmental Engineering in CE
Reingleman chart is used for the evaluation of __________ pollution.

Radioactive
Water
Air
Noise

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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
The disinfection efficiency of chlorine increases by(i) Decreasing the time of contact(ii) Decreasing the temperature of water(iii) Increasing the temperature of water

Only (i)
Only (iii)
Both (i) and (iii)
Both (i) and (ii)

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