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Environmental Engineering in CE

Environmental Engineering in CE
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?

Cruising
Deaccelaration
Acceleration
Idle running

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Environmental Engineering in CE
The disinfection efficiency of chlorine increases by(i) Decreasing the time of contact(ii) Decreasing the temperature of water(iii) Increasing the temperature of water

Only (i)
Only (iii)
Both (i) and (iii)
Both (i) and (ii)

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

CO
NH₃
SO₂ & SO₃
NO₂

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Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Atmospheric effect
Green house
Global warming
Ionosphere

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Environmental Engineering in CE
The pH value of oxidised sewage is about

13.4
1.8
7.3
6.2

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Environmental Engineering in CE
Pick out the wrong statement pertaining to 'green house' for the plants.

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