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Environmental Engineering in CE

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

Brine
None of these
Mercury
Phosphate

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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.

Potassium cyanide
Coal ash
Ortho-xylene
None of these

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Environmental Engineering in CE
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.

1
50
5
500

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Environmental Engineering in CE
The widest explosive limit is of __________ , thereby making it the most explosive gas.

Acetylene
Hydrogen
Petrol vapor
Carbon monoxide

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Environmental Engineering in CE
Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.

20
90
60
120

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Environmental Engineering in CE
Which of the following sources is responsible for maximum air pollution?

Industrial chimney exhaust
Forest fire
Automobiles exhaust
Photochemical oxidation of organic matter

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