The settling velocity of a particle in a sedimentation tank depends on__________________?

Question: A man exposed to excessive noise level in the working environment may suffer from
[A].

hearing loss

[B].

rupture of ear drum

[C].

nervousness & fatigue

[D].

all (a), (b) & (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Carbonaceous particles having size less than 1 μm are called
[A].

grit

[B].

aggregates

[C].

aerosols

[D].

smoke

Answer: Option D

Explanation:

No answer description available for this question.

Question: H2S present in gaseous stream can be removed by adsorption on
[A].

silica gel

[B].

active carbon

[C].

bog iron

[D].

limestone powder

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ozone is
[A].

a primary pollutant.

[B].

a secondary pollutant.

[C].

impervious to ultra-violet rays.

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.