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R-12 is generally preferred over R-22 in deep freezers since
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Pressure of water vapour is given by
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During dehumidification process, _________ remains constant.
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The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
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A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)
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A vapour absorption refrigeration system
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The C.O.P. of a heat pump working on a reversed Carnot cycle is
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The relative humidity lines on a psychrometric chart are
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The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called
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A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
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