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) Giving the surface a mirror finish Painting the surface black Roughening the surface Painting the surface white (with aluminium paint) Giving the surface a mirror finish Painting the surface black Roughening the surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not used as a medium for high temperature heating ? None of the listed here dowtherm mercury liquid metal None of the listed here dowtherm mercury liquid metal ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate described by Fourier's law will decrease, if the __________ increases. Thermal conductivity Heat transfer area Thickness Temperature difference Thermal conductivity Heat transfer area Thickness Temperature difference ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In forced convection, the Nusselt number is a function of Re and Sc Re and Pr Pr and Gr Re and Gr Re and Sc Re and Pr Pr and Gr Re and Gr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Water is normally used as a coolant in the heat exchange equipments mainly because ofits Low viscosity Low density Abundance & high heat capacity High fluidity Low viscosity Low density Abundance & high heat capacity High fluidity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) 0.5 D 0.3 D 0.2 D 0.4 D 0.5 D 0.3 D 0.2 D 0.4 D ANSWER DOWNLOAD EXAMIANS APP
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