Heat and Mass Transfer The use of heat exchangers is made in Radiators in automobile Condensers and boilers in steam plants All of these Condensers and evaporators in refrigeration and air conditioning units Radiators in automobile Condensers and boilers in steam plants All of these Condensers and evaporators in refrigeration and air conditioning units ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is valid for Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only Regular surfaces having non-uniform temperature gradients One dimensional cases only Three dimensional cases only Two dimensional cases only ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The rate of energy transferred by convection to that by conduction is called Nusselt number Peclet number Biot number Stanton number Nusselt number Peclet number Biot number Stanton number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A grey body is one whose absorptivity Varies with temperature Is equal to its emissivity Varies with wavelength of the incident ray Does not vary with temperature and. wavelength of the incident ray Varies with temperature Is equal to its emissivity Varies with wavelength of the incident ray Does not vary with temperature and. wavelength of the incident ray ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity) P = 0, x= 1, and a = 0 P = 0, x = 0 and a = 1 P=1, x = 0, and a = 0 X = 0, a + p = 1 P = 0, x= 1, and a = 0 P = 0, x = 0 and a = 1 P=1, x = 0, and a = 0 X = 0, a + p = 1 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 =-1/3 1 -1 =-2/3 =-1/3 1 -1 ANSWER DOWNLOAD EXAMIANS APP
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