The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

Environmental Engineering in CE
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

Decreases

Increases

May increase or decrease ; depends on the chemical characteristics of polluted water

Remains constant

Decreases

Increases

May increase or decrease ; depends on the chemical characteristics of polluted water

Remains constant

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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.

10-100

100-1000

100-200

10-100

100-1000

100-200

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Environmental Engineering in CE
Which of the following sources is responsible for maximum air pollution?

Automobiles exhaust

Industrial chimney exhaust

Forest fire

Photochemical oxidation of organic matter

Automobiles exhaust

Industrial chimney exhaust

Forest fire

Photochemical oxidation of organic matter

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Fire hazards

Depletion of oxygen

Undesirable plants growth

Explosion hazards

Fire hazards

Depletion of oxygen

Undesirable plants growth

Explosion hazards

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Environmental Engineering in CE
Which of the following is not a secondary air pollutant?

Photochemical smog

Sulphur dioxide

All of these

Ozone

Photochemical smog

Sulphur dioxide

All of these

Ozone

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Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Ortho-xylene

Coal ash

None of these

Potassium cyanide

Ortho-xylene

Coal ash

None of these

Potassium cyanide

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Environmental Engineering in CE

Environmental Engineering in CE The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

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 Which of the following sources is responsible for maximum air pollution?

Environmental Engineering in CE Presence of soluble organics in polluted water causes

Environmental Engineering in CE Which of the following is not a secondary air pollutant?

Environmental Engineering in CE Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

Environmental Engineering in CE
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

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
Which of the following sources is responsible for maximum air pollution?

Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Environmental Engineering in CE
Which of the following is not a secondary air pollutant?

Environmental Engineering in CE
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.