Heat Transfer Which of the following has the minimum absorptivity? Refractory bricks Coal dust Iron plates Aluminium foil Refractory bricks Coal dust Iron plates Aluminium foil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In the equation Q = UAΔt; Δt is Arithmetic mean temperature difference Logarithmic mean temperature difference The difference of average bulk temperatures of hot and cold fluids Geometric mean temperature difference Arithmetic mean temperature difference Logarithmic mean temperature difference The difference of average bulk temperatures of hot and cold fluids Geometric mean temperature difference ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it Occupies smaller space All of these Is more economical Is easy to operate and maintain Occupies smaller space All of these Is more economical Is easy to operate and maintain ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In forced convection, the Nusselt number is a function of Re and Pr Re and Gr Pr and Gr Re and Sc Re and Pr Re and Gr Pr and Gr Re and Sc ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is 0 1 between 0 and 1 >1 0 1 between 0 and 1 >1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. Decreases May increase or decrease; depends on the liquid Increases Remains unchanged Decreases May increase or decrease; depends on the liquid Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
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