Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

SO₂

CFC (chloro fluoro carbons)

CO

NOx

SO₂

CFC (chloro fluoro carbons)

CO

NOx

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Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Poly acrylonitrile

Photochemical smog

Benzopyrene

Peroxy acetyl nitrate (PAN) or methyl nitrile

Poly acrylonitrile

Photochemical smog

Benzopyrene

Peroxy acetyl nitrate (PAN) or methyl nitrile

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Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

All of these

Reflects and absorbs the longer wavelength (infra-red) radiations

Allows visible solar radiation (ultraviolet) of short wave-length to pass through

Prevents solar heat being radiated out completely, resulting in

All of these

Reflects and absorbs the longer wavelength (infra-red) radiations

Allows visible solar radiation (ultraviolet) of short wave-length to pass through

Prevents solar heat being radiated out completely, resulting in

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Environmental Engineering in CE
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

100-1000

10-100

100-200

100-1000

10-100

100-200

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Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

Centrifugal force on

Electrostatic force on

Diffusion of

Gravitational force on

Centrifugal force on

Electrostatic force on

Diffusion of

Gravitational force on

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

Skimming mill

Septic tank

Cesspool

Lagoon

Skimming mill

Septic tank

Cesspool

Lagoon

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Environmental Engineering in CE

Environmental Engineering in CE Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Environmental Engineering in CE Higher concentration of CO₂ in atmosphere

Environmental Engineering in CE Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

Environmental Engineering in CE Operating principle of cyclone separator is based on the action of __________ dust particles.

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

Environmental Engineering in CE
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

Environmental Engineering in CE
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

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