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Environmental Engineering in CE

Environmental Engineering in CE
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).

4.8
0.002
1.2
0.2

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Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

Diffusion of
Centrifugal force on
Electrostatic force on
Gravitational force on

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Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

Brine
Mercury
None of these
Phosphate

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Environmental Engineering in CE
In a sedimentation tank, the detention period for water ranges from __________ hours.

2 to 4
24 to 32
8 to 12
16 to 20

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

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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

Ionosphere
Global warming
Green house
Atmospheric effect

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