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ENVIRONMENTAL ENGINEERING IN CE

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

Phosphate
Brine
Mercury
None of these

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Environmental Engineering in CE
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Centrifugation
Chemical coagulation
Ultrafiltration
Floatation & skimming

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Environmental Engineering in CE
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

Acetylene
Ammonia
Carbon monoxide
Hydrogen

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Environmental Engineering in CE
The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

Dissolved oxygen content
Vapor pressure
Biological oxygen demand
All of these

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Environmental Engineering in CE
The pH value of oxidised sewage is about

7.3
6.2
1.8
13.4

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