Heat and Mass Transfer The transfer of heat by molecular collision is known as Radiation Convection None of these Conduction Radiation Convection None of these Conduction ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The product of Reynolds number and Prandtl number is known as Grashoff number Peclet number Biot number Stanton number Grashoff number Peclet number Biot number Stanton number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of air with rise in temperature Remain constant Increases May increase or decrease depending on temperature Decreases Remain constant Increases May increase or decrease depending on temperature Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The expression Q = ρ AT4 is called Joseph-Stefan equation Fourier equation Stefan-Boltzmann equation Newton Reichmann equation Joseph-Stefan equation Fourier equation Stefan-Boltzmann equation Newton Reichmann equation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body) (dx/dT) k. k. k. (dx/dT) k. (dT/dx) (dT/dx) (dx/dT) k. k. k. (dx/dT) k. (dT/dx) (dT/dx) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Newton's law of cooling, the heat transfer from a hot body to a cold body is Either (A) or (B) Directly proportional to the difference of temperatures between the two bodies Both (A) and (B) Directly proportional to the surface area Either (A) or (B) Directly proportional to the difference of temperatures between the two bodies Both (A) and (B) Directly proportional to the surface area ANSWER DOWNLOAD EXAMIANS APP
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