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Environmental Engineering in CE

Environmental Engineering in CE
Threshold limit value (TLV) of CO in air is __________ ppm.

2000
50
5
5000

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Environmental Engineering in CE
Exposure to chemicals having carcinogenic properties cause

Cancer
Asphyxiation (suffocation)
Dermatitis (skin disorder)
Asthma

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Environmental Engineering in CE
Which is the most practical and economical method for removal of suspended solid matter from polluted water?

Chlorination
Sedimentation
Skimming off
Biological oxidation

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Environmental Engineering in CE
Which of the following pollutants is absent in the emissions from a fertiliser plant ?

NO₂
NH₃
SO₂ & SO₃
CO

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Environmental Engineering in CE
Hardy cross method of analysis of distribution system(i) Involves successive trials(ii) Takes economic aspects into account(iii) Is time consuming

Only (i)
(i) and (iii)
All are correct
(i) and (ii)

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Environmental Engineering in CE
The resistance of water to the passage of light through it is a measure of the

Hardness
Color
Turbidity
Dissolved gases

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