Heat and Mass Transfer The amount of heat flow through a body by conduction is Directly proportional to the surface area of the body All of these Dependent upon the material of the body Directly proportional to the temperature difference on the two faces of the body Directly proportional to the surface area of the body All of these Dependent upon the material of the body Directly proportional to the temperature difference on the two faces of the body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as U/A.Cmin Cmin/U U.Cmin U/Cmin U/A.Cmin Cmin/U U.Cmin U/Cmin ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Conduction is a process of heat transfer From one particle of the body to another by the actual motion of the heated particles None of these From a hot body to a cold body, in a straight line, without affecting the intervening medium From one particle of the body to another without the actual motion of the particles From one particle of the body to another by the actual motion of the heated particles None of these From a hot body to a cold body, in a straight line, without affecting the intervening medium From one particle of the body to another without the actual motion of the particles 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) k. (dT/dx) k. (dx/dT) k. (dx/dT) k. (dT/dx) k. (dT/dx) k. (dx/dT) k. (dx/dT) k. (dT/dx) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Planck’s law holds good for black bodies all coloured bodies All of these polished bodies black bodies all coloured bodies All of these polished bodies ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Prevost theory of heat exchange All bodies above absolute zero emit radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source Heat transfer in most of the cases takes place by combination of conduction, convection and radiation All bodies above absolute zero emit radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source Heat transfer in most of the cases takes place by combination of conduction, convection and radiation ANSWER DOWNLOAD EXAMIANS APP
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