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Environmental Engineering in CE

Environmental Engineering in CE
The pH value of oxidised sewage is about

13.4
1.8
7.3
6.2

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Environmental Engineering in CE
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the

Green house effect
Catalytic conversion
Global warming
Both B and C

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Environmental Engineering in CE
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

Dissolved oxygen content
Biological oxygen demand
Vapor pressure
All of these

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Environmental Engineering in CE
The principal gas evolved from sludge digestion tank is

CH₄
CO
CO₂
N₂

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Environmental Engineering in CE
In a sedimentation tank, the detention period for water ranges from __________ hours.

2 to 4
24 to 32
16 to 20
8 to 12

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Environmental Engineering in CE
Growth of __________ is promoted by the presence of manganese in water.

Algae
Micro-organisms
Files
Mosquitoes

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