The characteristics of fresh and septic sewage respectively are____________________?

Question: Which of the following pollutants, if present in atmosphere is detectable by its odour ?
[A].

CO

[B].

SO2

[C].

NO2

[D].

CO2

Answer: Option B

Explanation:

No answer description available for this question.

Question: Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
[A].

with greater number of blades.

[B].

of increased diameter.

[C].

both (a) & (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Noise level during normal conversation among men is about __________ decibles.
[A].

10

[B].

45

[C].

90

[D].

115

Answer: Option B

Explanation:

No answer description available for this question.

Question: Peroxyacyl nitrate (PAN), a pollutant is found in the
[A].

automobile exhaust.

[B].

flue gas of coal based power plant.

[C].

exhaust of nitric acid plant.

[D].

exhaust of sulphuric acid plant.

Answer: Option A

Explanation:

No answer description available for this question.