Heat and Mass Transfer A non-dimensional number generally associated with natural convection heat transfer is Grashoff number Weber number Prandtl number Nusselt number Grashoff number Weber number Prandtl number Nusselt number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Stefan Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the Absolute temperature Cube of the absolute temperature Square of the absolute temperature Fourth power of the absolute temperature Absolute temperature Cube of the absolute temperature Square of the absolute temperature Fourth power of the absolute temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to =-2/3 -1 =-1/3 1 =-2/3 -1 =-1/3 1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Prevost theory of heat exchange Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source Heat transfer in most of the cases takes place by combination of conduction, convection and radiation All bodies above absolute zero emit radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source Heat transfer in most of the cases takes place by combination of conduction, convection and radiation All bodies above absolute zero emit radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat) (L.H - S.H)/S.H (S.H + L.H) /S.H S.H/(S.H + L.H) S.H/(L.H - S.H) (L.H - S.H)/S.H (S.H + L.H) /S.H S.H/(S.H + L.H) S.H/(L.H - S.H) 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 0.1 0.01 0.02 0.002 0.1 0.01 0.02 ANSWER DOWNLOAD EXAMIANS APP
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