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Environmental Engineering in CE

Environmental Engineering in CE
Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).

Highly
Extremely
Very extremely
Moderately

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Environmental Engineering in CE
Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.

Highly
Extremely
Moderately
Very extremely

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Environmental Engineering in CE
The pH value of potable water should be between

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

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Environmental Engineering in CE
Salt content in sea water is about __________ percent.

1
0.5
3.5
10

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Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

1
0.001
5
0.1

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Environmental Engineering in CE
Fresh sewage is __________ in nature.

Neutral
Alkaline
Highly acidic
Acidic

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