The slope of sewer shall be__________________?

Question: Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
[A].

phosgene

[B].

bromine

[C].

MIC (methyl iso-cynate)

[D].

ozone

Answer: Option C

Explanation:

No answer description available for this question.

Question: Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
[A].

hydrocarbons

[B].

hydrogen flouride

[C].

hydrogen sulphides

[D].

nitrogen dioxide

Answer: Option B

Explanation:

No answer description available for this question.

Question: During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
[A].

filtration

[B].

digestion

[C].

sedimentation

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Carcinogenic air pollutants cause
[A].

bone decay

[B].

cancer

[C].

asphyxiation (suffocation)

[D].

anemia

Answer: Option B

Explanation:

No answer description available for this question.

Question: Infective bacteria in water is killed by the __________ process.
[A].

sterilisation

[B].

aeration

[C].

disinfection

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Main pollutants released from petroleum refineries is
[A].

CO, SO2 & H2S.

[B].

CO2, NO & SO3.

[C].

CO2, H2S & NO2.

[D].

SO3, NO2 & CO2.

Answer: Option A

Explanation:

No answer description available for this question.