Joule sec is the unit of
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The unit of overall coefficient of heat transfer is
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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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All radiations in a black body are
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Fourier's law of heat conduction is valid for
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In counter flow heat exchangers
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A non-dimensional number generally associated with natural convection heat transfer is
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A grey body is one whose absorptivity
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Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called
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Unit of thermal diffusivity is
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Thermal diffusivity is
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The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj - 2K2 will be
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