Heat and Mass Transfer The emissivity for a black body is 0.5 1 0.75 0.5 1 0.75 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat flows from one body to other when they have Different atomic structure Different heat contents Different specific heat Different temperatures Different atomic structure Different heat contents Different specific heat Different temperatures ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thermal diffusivities for gases are generally More than those for liquids More than those for solids Dependent on the viscosity Less than those for liquids More than those for liquids More than those for solids Dependent on the viscosity Less than those for liquids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, One should take into account the steam temperature before deciding as to which insulation is put where One could place either insulation on either side The better insulation must be put inside The better insulation must be put outside One should take into account the steam temperature before deciding as to which insulation is put where One could place either insulation on either side The better insulation must be put inside The better insulation must be put outside 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 U/Cmin Cmin/U U.Cmin U/A.Cmin U/Cmin Cmin/U U.Cmin ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of 0.002 0.01 0.02 0.1 0.002 0.01 0.02 0.1 ANSWER DOWNLOAD EXAMIANS APP
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