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Environmental Engineering in CE

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

Powder
Smoke
Grit
Aggregates

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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
The pH value of potable water should be between

6.5 to 8
13 to 14
1 to 1.5
4 to 5

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Environmental Engineering in CE
H₂S present in gaseous stream can be removed by adsorption on

Silica gel
Bog iron
Active carbon
Limestone powder

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Environmental Engineering in CE
__________ can not control the noise pollution.

Use of silencers
Tree plantation
Green house gases
Vibration damping

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

0.01
0.1
1
0.3

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