Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by 1/εx + 1/εy Εx . εy (εx + εy)/(εx + εy - εx . εy) Εx + εy 1/εx + 1/εy Εx . εy (εx + εy)/(εx + εy - εx . εy) Εx + εy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate per unit area is called thermal conductivity heat transfer co-efficient thermal diffusivity heat flux thermal conductivity heat transfer co-efficient thermal diffusivity heat flux ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Agitated film evaporator is suitable for concentrating __________ liquids. Very thin Viscous Corrosive Foaming Very thin Viscous Corrosive Foaming ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Analogy between mass and heat transfer is not applicable in case of Viscous heating or chemical reaction Thermal or pressure mass diffusion Same velocity profile or equal eddy diffusivities Both B and C Viscous heating or chemical reaction Thermal or pressure mass diffusion Same velocity profile or equal eddy diffusivities Both B and C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are preferably useful, when Overall heat transfer co-efficient is very high Requirement of heat transfer area is low A corrosive liquid is to be heated High viscosity liquid is to be cooled Overall heat transfer co-efficient is very high Requirement of heat transfer area is low A corrosive liquid is to be heated High viscosity liquid is to be cooled ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate described by Fourier's law will decrease, if the __________ increases. Heat transfer area Thickness Thermal conductivity Temperature difference Heat transfer area Thickness Thermal conductivity Temperature difference ANSWER DOWNLOAD EXAMIANS APP
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