Heat and Mass Transfer The value of Prandtl number for air is about 1.7 0.7 0.3 0.1 1.7 0.7 0.3 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Total emissivity of polished silver compared to black body is Very much lower Higher Same More or less same Very much lower Higher Same More or less same ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature. Minimum energy Both (A) and (B) None of these Maximum energy Minimum energy Both (A) and (B) None of these Maximum energy ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The energy distribution of an ideal reflector at higher temperatures is largely in the range of Wavelength has nothing to do with it Longer wavelength Shorter wavelength Remain same at all wavelengths Wavelength has nothing to do with it Longer wavelength Shorter wavelength Remain same at all wavelengths ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Moisture would find its way into insulation by vapour pressure unless it is prevented by A vapour seal Less thermal conductivity insulator High vapour pressure High thickness of insulation A vapour seal Less thermal conductivity insulator High vapour pressure High thickness of insulation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for Two dimensional cases only Regular surfaces having non-uniform temperature gradients Three dimensional cases only One dimensional cases only Two dimensional cases only Regular surfaces having non-uniform temperature gradients Three dimensional cases only One dimensional cases only ANSWER DOWNLOAD EXAMIANS APP
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