Environmental Engineering

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

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Question: In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)
[A].

t = 15 – 0.0065h

[B].

t = 15 + 0.0065h

[C].

t = 0.0035h -15

[D].

t = 15 – 0.0035h

Answer: Option A

Explanation:

No answer description available for this question.

In the context of the chemical process industries, the term BOD is normally associated with the

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Question: In the context of the chemical process industries, the term BOD is normally associated with the
[A].

characterisation of solid wastes.

[B].

organic concentration in gaseous effluents.

[C].

characterisation of liquid effluents.

[D].

characterisation of boiler feed water.

Answer: Option C

Explanation:

No answer description available for this question.

A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called

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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.

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

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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.

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of

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Question: Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
[A].

CO2

[B].

SO2

[C].

hydrocarbons

[D].

CFC (chloro fluoro carbon)

Answer: Option D

Explanation:

No answer description available for this question.

Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?

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Question: Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?
[A].

CO2

[B].

H2

[C].

SO3

[D].

N2

Answer: Option C

Explanation:

No answer description available for this question.