EXAMIANS
An ordinary passenger aircraft requires a cooling system of capacity.
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The amount of heat flow through a body by conduction is
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The critical thickness of insulation for a sphere is
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Cork is a good insulator because it has
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Fouling factor is used
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The heat is transferred by conduction, convection and radiation in
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Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, X = transmissivity.)
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According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a
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Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be
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A steam pipe is to be insulated by two insulating materials put over each other. For best results
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