The maximum permissible limit for flouride in drinking water is______________?

Question: A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
[A].

cesspool

[B].

lagoon

[C].

skimming mill

[D].

septic tank

Answer: Option D

Explanation:

No answer description available for this question.

Question: Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of ____ metres.
[A].

100

[B].

1000

[C].

400

[D].

4000

Answer: Option B

Explanation:

No answer description available for this question.

Question: COD of raw municipal sewage may be in the range of about __________ mg/litre.
[A].

1-2

[B].

5-10

[C].

90-120

[D].

1500-2500

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ plant emits large amount of SO2 as an air pollutant.
[A].

Nitric acid

[B].

Sulphuric acid

[C].

Chloralkali

[D].

Iron & steel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
[A].

1-2

[B].

5-10

[C].

15-20

[D].

25-30

Answer: Option B

Explanation:

No answer description available for this question.