Heat and Mass Transfer The transfer of heat by molecular collision is smallest in Gases None of these Liquids Solids Gases None of these Liquids Solids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside The better insulation must be put outside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside The better insulation must be put outside One could place either insulation on either side ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal diffusivity is a All of these Physical property of a substance Dimensionless parameter Function of temperature All of these Physical property of a substance Dimensionless parameter Function of temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Kirchhoff's law Wien's law Stefan's law Planck's law Kirchhoff's law Wien's law Stefan's law Planck's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, X = transmissivity.) X = 0, a + p = 0 P= 1, T = 0 and a = 0 P = 0, x = 0 and a = 1 P = 0, x = 1 and a = 0 X = 0, a + p = 0 P= 1, T = 0 and a = 0 P = 0, x = 0 and a = 1 P = 0, x = 1 and a = 0 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called Temperature gradient Thermal coefficient Thermal conductivity Thermal resistance Temperature gradient Thermal coefficient Thermal conductivity Thermal resistance ANSWER DOWNLOAD EXAMIANS APP
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