Heat and Mass Transfer Which of the following property of air does not increase with rise in temperature? Thermal conductivity Thermal diffusivity Dynamic viscosity Density Thermal conductivity Thermal diffusivity Dynamic viscosity Density ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity) X = 0, a + p = 1 P = 0, x = 0 and a = 1 P=1, T = 0 and a = 0 P = 0, x = 1 and a = 0 X = 0, a + p = 1 P = 0, x = 0 and a = 1 P=1, T = 0 and a = 0 P = 0, x = 1 and a = 0 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The heat transfer takes place according to Kirchhoff's law First law of thermodynamics Second law of thermodynamics Zeroth law of thermodynamics Kirchhoff's law First law of thermodynamics Second law of thermodynamics Zeroth law of thermodynamics ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total radiation from a black body per second per unit area is ________ fourth power of the absolute temperature. This statement is known as Stefan Boltzmann law. Equal to None of these Directly proportional to Inversely proportional to Equal to None of these Directly proportional to Inversely proportional to ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of 0.01 0.02 0.002 0.1 0.01 0.02 0.002 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The transfer of heat by molecular collision is smallest in Gases Liquids Solids None of these Gases Liquids Solids None of these ANSWER DOWNLOAD EXAMIANS APP
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