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Environmental Engineering in CE

Environmental Engineering in CE
Inorganic impurities causing water pollution is

Salts of metals
Protein
Carbohydrates
Fats

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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?

H₂
SO₃
N₂
CO₂

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Environmental Engineering in CE
Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.

7
82
19
1

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Environmental Engineering in CE
Presence of excess flourine in water causes

Respiratory disease
Tooth decay
Fluorosis
Dental cavity

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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
High noise level in a chemical plant can be controlled by the

Suppression of noise at the source itself
Protection of operating personnel
Path control of noise
All of these

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