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Environmental Engineering in CE

Environmental Engineering in CE
Polyvinyl chloride containers are not suitable for storing

None of these
Foodstuffs
Metallic powder
Woolen clothes

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Environmental Engineering in CE
Which of the following is a manmade source of air pollution?

Automobile exhaust
Forest fire
Bacterial action in soil and swamp areas
All of these

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Environmental Engineering in CE
Main pollutant present in automobile exhaust is

CO₂
CO
Hydrocarbons
NO

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Environmental Engineering in CE
Dose of chlorine for disinfection of water is about __________ mg/litre of water.

0.3
0.01
0.1
1

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

CO₂
CH₄
N₂
CO

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Environmental Engineering in CE
When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell.

4
1
0.01
0.1

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