Heat and Mass Transfer The unit of Stefan Boltzmann constant is watt/cm4 °K watt2/cm °K⁴ watt/cm3 °K watt/cm2 °K⁴ watt/cm4 °K watt2/cm °K⁴ watt/cm3 °K watt/cm2 °K⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A grey body is one whose absorptivity Does not vary with temperature and. wavelength of the incident ray Is equal to its emissivity Varies with temperature Varies with wavelength of the incident ray Does not vary with temperature and. wavelength of the incident ray Is equal to its emissivity Varies with temperature Varies with wavelength of the incident ray ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Upto the critical radius of insulation, Heat flux will decrease Added insulation will decrease heat loss Convective heat loss will be less than conductive heat loss Added insulation will increase heat loss Heat flux will decrease Added insulation will decrease heat loss Convective heat loss will be less than conductive heat loss Added insulation will increase heat loss ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as Forced convection Free convection Radiation Conduction Forced convection Free convection Radiation Conduction ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following property of air does not increase with rise in temperature? Density Thermal conductivity Thermal diffusivity Dynamic viscosity Density Thermal conductivity Thermal diffusivity Dynamic viscosity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In a shell and tube heat exchanger, baffles are provided on the shell side to Provide support for tubes Improve heat transfer Prevent stagnation of shell side fluid All of these Provide support for tubes Improve heat transfer Prevent stagnation of shell side fluid All of these ANSWER DOWNLOAD EXAMIANS APP
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