Heat and Mass Transfer Planck’s law holds good for All of these all coloured bodies polished bodies black bodies All of these all coloured bodies polished bodies black bodies 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 0.002 0.01 0.02 0.1 0.002 0.01 0.02 0.1 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 Directly proportional to None of these Inversely proportional to Equal to Directly proportional to None of these Inversely proportional to ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The critical radius is the insulation radius at which the resistance to heat flow is Maximum None of these Zero Minimum Maximum None of these Zero Minimum ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thermal diffusivities for solids are generally More than those for liquids and gases Less than those for gases Less than those for liquids More or less same as for liquids and gases More than those for liquids and gases Less than those for gases Less than those for liquids More or less same as for liquids and gases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of glass wool varies from sample to sample because of variation in Composition Density Porosity All of these Composition Density Porosity All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS