Chemical Engineering :: Environmental Engineering
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The commonest form of iron & manganese found in ground water as pollutant is in the form of their
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Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
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Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
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Most of the atmospheric air pollutants are present in large quantity in
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Pick out the wrong statement.
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'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
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The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
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Pick out the wrong statement.
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A.
Caustic embrittlement of boiler's metallic parts is caused by high concentration of caustic soda in boiler feed water.
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B.
Cooling and freezing of water kills the bacteria present in it.
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C.
With increasing boiler operating pressure of steam, the maximum allowable concentration of silica in feed water goes on decreasing.
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D.
Dissolved oxygen content in high pressure boiler feed water should be nil.
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A.
The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone.
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B.
Mesosphere is characterised by very low atmospheric pressure and low temperature.
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C.
Troposhere is a dusty zone containing water vapor and clouds.
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D.
The radio waves used in the long distance radio communication are reflected back to earth by stratosphere.
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