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Environmental Engineering in CE

Environmental Engineering in CE
TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

0.1
100
25
1000

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

Hardness
Color
Dissolved gases
Turbidity

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Environmental Engineering in CE
Infective bacteria in water is killed by the __________ process.

Aeration
Sterilisation
Disinfection
None of these

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Environmental Engineering in CE
The main type of sludge gas evolved during sewage treatment in Imhoff tank is

CO
H₂
CO₂
CH₄

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Environmental Engineering in CE
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called

Thermosphere
Troposphere
Stratosphere
Mesosphere

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Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

5
1000
100
2000

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