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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

250
10
1000
1

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Environmental Engineering in CE
Smog is

Nothing but black smoke
A solid particle e.g. flyash
A combination of smoke and fog
A liquid particle resulting from vapor condensation

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Environmental Engineering in CE
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Inhances the green house effect
Causes asphyxia
Causes increase in sea level
Acts as a green house gas thereby raising earth's temperature

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Environmental Engineering in CE
Fresh domestic sewage is __________ in color.

Black
Red
Dark brown
Grey

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Environmental Engineering in CE
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.

6.5
0.05
1
15

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Environmental Engineering in CE
Noise level in a quiet private business office is about __________ decibels.

50
25
85
70

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