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Environmental Engineering in CE

Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

125
80
145
100

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Environmental Engineering in CE
Which is a secondary air pollutant?

Dust particles
Photochemical smog
Nitrogen dioxide
Sulphur dioxide

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

Dissolved gases
Turbidity
Color
Hardness

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Environmental Engineering in CE
Dissolved oxygen content in river water is around __________ ppm.

500
100
5
250

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Environmental Engineering in CE
Presence of nitrates in water in excess of 50 ppm causes

Mathenoglobenemia
Asphyxiation
Tooth decay
Gastroentetitis

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Environmental Engineering in CE
Deaeration of high pressure boiler feed water is done to reduce

Foaming from boilers
Its dissolved oxygen content
Caustic embrittlement
Its silica content

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