Heat and Mass Transfer Emissivity of a white polished body in comparison to a black body is Same Higher Depends upon the shape of body Lower Same Higher Depends upon the shape of body Lower ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called Convection None of these Radiation Conduction Convection None of these Radiation Conduction 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/Cmin U.Cmin Cmin/U U/A.Cmin U/Cmin U.Cmin Cmin/U U/A.Cmin ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water in general with rise in temperature May increase or decrease depending on temperature Decreases Increases Remain constant May increase or decrease depending on temperature Decreases Increases Remain constant ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit Thickness Temperature Area Time Thickness Temperature Area Time ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is 0.45 0.55 0.4 0.75 0.45 0.55 0.4 0.75 ANSWER DOWNLOAD EXAMIANS APP
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