Sewage treatment units are normally designed for______________?

Question: Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
[A].

paralysis of muscles & loss of appetite.

[B].

nervous depression.

[C].

gastritis & diarrhea.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: The biological decomposition of organic substances in wastes controlled conditions is called
[A].

incineration

[B].

biological oxidation

[C].

composting

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ozone level is generally found to be depleted in India in the month of
[A].

February

[B].

July

[C].

April

[D].

December

Answer: Option D

Explanation:

No answer description available for this question.