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Environmental Engineering in CE

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

Noise pollution
SPM
Thermal pollution
Radioactive rays

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Environmental Engineering in CE
Soluble silica present in boiler feed water can be removed by

Preheating it
Anion exchanger
Filtration
Coagulation

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Environmental Engineering in CE
Solid content in most of the domestic sewage is about __________ percent.

0.001
5
0.1
10

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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 main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by

Gravity separator having oil skimming devices
Trickling filters
Aerated lagoons
Biological oxygen pond

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Environmental Engineering in CE
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

Asbestos
Hydrogen sulphide
Mercury
Cadmium

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MORE MCQ ON Environmental Engineering in CE

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