Chemical Engineering · all questions

Environmental Engineering
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Q161

Which is the most widely used coagulant for the treatment of turbid water?

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Q162

Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

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Q163

Green house effect is accentuated by

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Q164

Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

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Q165

Inhalation of silica dust by human being causes

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Q166

Pick out the correct statement.

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Q167

Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?

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Q168

Tolerable limit of nitrogen oxides in air is __________ ppm.

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Q169

Pick out the wrong statement.

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Q170

Inorganic impurities causing water pollution is

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Q171

Tri-sodium phosphate is used in boiler water treatment to reduce

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Q172

Corrosion in boilers can be prevented by

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Q173

Iron & manganese present as pollutant in water can not be removed by

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Q174

Which of the following is the most widely used disinfectant in water treatment?

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Q175

The widest explosive limit is of __________ , thereby making it the most explosive gas.

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Q176

Siderosis is a disease caused by the inhalation of __________ dust.

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Q177

'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.

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Q178

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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Q179

Scale formation in boiler is controlled by

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Q180

Pick out the wrong statement.

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