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?

NOx

CO

SO₂

CFC (chloro fluoro carbons)

NOx

CO

SO₂

CFC (chloro fluoro carbons)

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Environmental Engineering in CE
The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is

(i)and(iv)

(ii) and (iv)

(i) and (ii)

(ii) and (iii)

(i)and(iv)

(ii) and (iv)

(i) and (ii)

(ii) and (iii)

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Environmental Engineering in CE
In the context of the chemical process industries, the term BOD is normally associated with the

Organic concentration in gaseous effluents

Characterisation of liquid effluents

Characterisation of solid wastes

Characterisation of boiler feed water

Organic concentration in gaseous effluents

Characterisation of liquid effluents

Characterisation of solid wastes

Characterisation of boiler feed water

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Environmental Engineering in CE
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Cancer

Respiratory disease (e.g., asthma)

Reduced crop yield

Silicosis

Cancer

Respiratory disease (e.g., asthma)

Reduced crop yield

Silicosis

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Environmental Engineering in CE
Polluted water having low BOD are most economically treated in

Clarifier

Sludge digester

Sedimentation tanks

Oxidation ponds

Clarifier

Sludge digester

Sedimentation tanks

Oxidation ponds

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Environmental Engineering in CE
Inhalation of silica dust causes a disease called

None of these

Pneumoconiosis

Bronchitis

Silicosis

None of these

Pneumoconiosis

Bronchitis

Silicosis

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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 The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is

Environmental Engineering in CE In the context of the chemical process industries, the term BOD is normally associated with the

Environmental Engineering in CE High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Environmental Engineering in CE Polluted water having low BOD are most economically treated in

Environmental Engineering in CE Inhalation of silica dust causes a disease 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
The amount of coagulant needed for coagulation of water increases with(i) Increase in turbidity of water(ii) Decrease in turbidity of water(iii) Increase in temperature of water(iv) Decrease in temperature of waterThe correct answer is

Environmental Engineering in CE
In the context of the chemical process industries, the term BOD is normally associated with the

Environmental Engineering in CE
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

Environmental Engineering in CE
Polluted water having low BOD are most economically treated in

Environmental Engineering in CE
Inhalation of silica dust causes a disease called