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Environmental Engineering in CE

Environmental Engineering in CE
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

140
120
170
200

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

Color
Dissolved gases
Hardness
Turbidity

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Environmental Engineering in CE
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by

Chemical coagulation
Chlorination
Treating in biological oxygen pond
None of these

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Environmental Engineering in CE
Which of the following is not a weightless pollutant?

SPM
Radioactive rays
Thermal pollution
Noise pollution

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Environmental Engineering in CE
__________ substances present in sewage are removed in grit chamber during sewage treatment.

Fatty
Organic
Inorganic
Dissolved

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Environmental Engineering in CE
Which is the most practical and economical method for removal of suspended solid matter from polluted water?

Sedimentation
Skimming off
Biological oxidation
Chlorination

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