EXAMIANS
Deaeration of high pressure boiler feed water is done to reduce
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Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.
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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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Dust collection efficiency of a cyclone separator depends upon its
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Which is a secondary air pollutant?
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Which of the following is a secondary air pollutant?
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Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.
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Which of the following is not a source of ozone emission in the atmosphere?
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Which of the following is an adsorbant used for the removal of SO₂ from gas/air?
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__________ is removed from water by lime-soda process.
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