Heat and Mass Transfer Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity) h = ρS/k h = k/ ρS h = kρ/S h = S/ρk h = ρS/k h = k/ ρS h = kρ/S h = S/ρk ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body Does not affect the intervening medium Affect the intervening medium Do not move actually Move actually Does not affect the intervening medium Affect the intervening medium Do not move actually Move actually ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Planck’s law holds good for black bodies polished bodies All of these all coloured bodies black bodies polished bodies All of these all coloured bodies ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer When heat is transferred by molecular collision, it is referred to as heat transfer by Scattering Radiation Convection Conduction Scattering Radiation Convection Conduction ANSWER DOWNLOAD EXAMIANS APP
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 Forced convection Convection Free convection Radiation Forced convection Convection Free convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In case of liquids and gases, the heat transfer takes place according to Convection None of these Conduction Radiation Convection None of these Conduction Radiation ANSWER DOWNLOAD EXAMIANS APP
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