Heat Transfer In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) α ≠ 1, ε = 1 α = 1; ε = 1 α = 1; ε ≠ 1 α ≠ 1, ε ≠ 1 α ≠ 1, ε = 1 α = 1; ε = 1 α = 1; ε ≠ 1 α ≠ 1, ε ≠ 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Painting the surface white (with aluminium paint) Painting the surface black Roughening the surface Giving the surface a mirror finish Painting the surface white (with aluminium paint) Painting the surface black Roughening the surface Giving the surface a mirror finish ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law. Wien's displacement None of these Stefan-Boltzman's Planck's Wien's displacement None of these Stefan-Boltzman's Planck's ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Either A, B or C Geometric Arithmetic Logarithmic Either A, B or C Geometric Arithmetic Logarithmic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Temperature profile in steady state heat transfer is Linear parabolic none of the listed here hyperbolic Linear parabolic none of the listed here hyperbolic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Convective heat transfer, in which heat is transferred by movement of warmed matter is described by Newton's law of cooling None of these Fourier's law Fick's law Newton's law of cooling None of these Fourier's law Fick's law ANSWER DOWNLOAD EXAMIANS APP
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