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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is the most detrimental for water used in high pressure boiler?

Silica
Turbidity
Dissolved oxygen
Phenol

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Environmental Engineering in CE
In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0035h
t = 0.0035h -15
t = 15 + 0.0065h
t = 15 - 0.0065h

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Environmental Engineering in CE
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.

5
500
50
1

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Environmental Engineering in CE
Which of the following is a manmade source of air pollution?

All of these
Forest fire
Bacterial action in soil and swamp areas
Automobile exhaust

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Cancer
Bone disease
Skin disorder
Bronchitis

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Environmental Engineering in CE
Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes

Explosion hazards
Depletion of dissolved oxygen
Persistent foam
Fire hazards

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