EXAMIANS
Nitrogen oxides (NOx) is not produced in the __________ industry.
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Which of the following is the most detrimental for water used in high pressure boiler?
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Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
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Higher concentration of nitrogen dioxide in atmospheric air causes
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Which of the following pollutants, if present in atmosphere is detectable by its odour?
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Dust collection efficiency of a cyclone separator depends upon its
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The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.
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There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
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Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
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Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
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