Heat and Mass Transfer Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by Convection Forced convection Free convection Radiation Convection Forced convection Free convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of surface convection resistance to the internal conduction resistance is known as Prandtl number Grashoff number Biot number Stanton number Prandtl number Grashoff number Biot number Stanton number 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 Minimum Zero Maximum None of these Minimum Zero ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in Cross flow Counter flow All of these Parallel flow Cross flow Counter flow All of these Parallel flow ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thermal diffusivities for gases are generally More than those for liquids Dependent on the viscosity Less than those for liquids More than those for solids More than those for liquids Dependent on the viscosity Less than those for liquids More than those for solids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Planck’s law holds good for All of these black bodies polished bodies all coloured bodies All of these black bodies polished bodies all coloured bodies ANSWER DOWNLOAD EXAMIANS APP
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