Mechanical Engineering :: Heat Transfer,Refrigeration and Air Conditioning
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While designing the refrigeration system of an aircraft, the prime consideration is that the
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The heat transfer takes place according to
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An electrolux refrigerator is called a __________ absorption system.
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Thermal conductivity of water __________ with rise in temperature.
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During adiabatic saturation process on unsaturated air __________ remains constant.
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The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
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A perfect black body is one which
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Degree of saturation or percentage humidity is
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The coefficient of performance of Heat Pump is always __________ one.
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A.
the mass of water vapour present in 1 m3 of dry air
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B.
the mass of water vapour present in 1 kg of dry air
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C.
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.
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D.
the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure
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