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Environmental Engineering in CE

Environmental Engineering in CE
World environment day is observed every year on the 5th of

July
December
June
September

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

120
200
170
140

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Environmental Engineering in CE
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

Quenching of hot coke
None of these
Discharging in the river stream
Filtration and recycling for cooling coke oven gas

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Environmental Engineering in CE
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

120
140
75
95

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Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Ortho-xylene
None of these
Potassium cyanide
Coal ash

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Environmental Engineering in CE
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.

10
1
5
20

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