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Environmental Engineering in CE

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

Grit
Smoke
Aggregates
Powder

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Environmental Engineering in CE
The widest explosive limit is of __________ , thereby making it the most explosive gas.

Carbon monoxide
Hydrogen
Petrol vapor
Acetylene

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Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

1000
100
25
0.1

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Environmental Engineering in CE
The biological decomposition of organic substances in wastes controlled conditions is called

Incineration
Biological oxidation
None of these
Composting

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Environmental Engineering in CE
In water treatment plant, zeolite process is used to remove the __________ of water.

Alkalinity
Hardness
Iron & zinc
Acidity

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Environmental Engineering in CE
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

Anaemia
Nervous system disorder
All of these
Blood poisoning

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