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Environmental Engineering in CE

Environmental Engineering in CE
Most of the atmospheric air pollutants are present in large quantity in

Thermosphere
Stratosphere
Trophosphere
Mesosphere

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Environmental Engineering in CE
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.

35
75
95
105

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

Sulphuric acid
Nitric acid
Iron & steel
Chloralkali

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

Gastroentetitis
Asphyxiation
Tooth decay
Mathenoglobenemia

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Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Sedimentation
Coagulation
Filtration
Disinfection

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Environmental Engineering in CE
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?

N₂
CO₂
H₂
SO₃

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