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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 3
41.
Which of the following is the most widely used disinfectant in water treatment ?
Chlorine
Irradiation of water by ultraviolet light
Cation exchanger
Coagulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Pick out the wrong statement
Low ozone layer thickness in polar regions is due to cold climatic conditions
Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine.
Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine.
Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing minamate disease.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by
quenching of hot coke.
discharging in the river stream.
filtration and recycling for cooling coke oven gas.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
5-200 μm size particles are called
colloids or aerosols
powder
dust
smoke
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The progressive warming up of the earth's surface is mainly due to the
automobile exhaust.
blanketing effect of CO2 in the atmosphere.
de-forestation.
thickening of ozone layer.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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