Heat and Mass Transfer The value of the wavelength for maximum emissive power is given by Wien’s law Stefan's law Planck's law Fourier's law Wien’s law Stefan's law Planck's law Fourier's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, One could place either insulation on either side The better insulation must be put outside One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside One could place either insulation on either side The better insulation must be put outside One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put inside ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water in general with rise in temperature Decreases Remain constant Increases May increase or decrease depending on temperature Decreases Remain constant Increases May increase or decrease depending on temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer When α is absorptivity, ρ is reflectivity and τ is transmissivity, then for a diathermanous body, α + ρ = 1 and τ = 0 α = 1, ρ = 0 and τ = 0 α = 0, ρ = 1 and τ = 0 α = 0, ρ = 0 and τ = 1 α + ρ = 1 and τ = 0 α = 1, ρ = 0 and τ = 0 α = 0, ρ = 1 and τ = 0 α = 0, ρ = 0 and τ = 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 1 =-1/3 =-2/3 -1 1 =-1/3 =-2/3 -1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The emissive power of a body depends upon its Wave length All of these Physical nature Temperature Wave length All of these Physical nature Temperature ANSWER DOWNLOAD EXAMIANS APP
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