Environmental Engineering

1. _________ cannot control the noise pollution.

1. Use of silencers
2. Green house gases
3. Vibration damping
4. Tree plantation

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2. _________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant.

1. Calcium
2. Fluorine
3. Phosphorous
4. Sulphur

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3. _________ is removed from water by lime-soda process.

1. Foul smell and taste
2. Iron and manganese
3. Temporary hardness
4. Permanent hardness

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4. _________ is the process of killing organism in water.

1. Coagulation
2. Sterilisation
3. Disinfection
4. Sedimentation

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5. _________ plant emits large amount of SO₂ as an air pollutant.

1. Nitric acid
2. Sulphuric acid
3. Chlor alkali
4. Iron&steel

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6. _________ substances present in sewage are removed in grit chamber during sewage treatment.

1. Organic
2. Fatty
3. Inorganic
4. Dissolved

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7. Which of the following is a secondary air pollutant?

1. Photochemical smog
2. Sulphur dioxide
3. Nitrogen dioxide
4. Dust particles

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8.'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟?

1. Dust&mists
2. Smoke&fumes
3. Photochemical smog&soot
4. None of these

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

1. Coal
2. Uranium ore
3. Iron ore
4. Lime

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10.'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

1. Industrial chimney exhaust
2. Automobiles exhaust
3. Photochemical reaction in polluted atmosphere
4. Burning of domestic fuel

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