Heat and Mass Transfer The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit Time Thickness Temperature Area Time Thickness Temperature Area ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally May increase or decrease depending on temperature Increases Decreases Remain constant May increase or decrease depending on temperature Increases Decreases Remain constant ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Fouling factor is used When a liquid exchanges heat with a gas In case of Newtonian fluids None of these In heat exchanger design as a safety factor When a liquid exchanges heat with a gas In case of Newtonian fluids None of these In heat exchanger design as a safety factor ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Log mean temperature difference in case of counter flow compared to parallel flow will be Same Less More Depends on other factors Same Less More Depends on other factors ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100°C and leaves at 60°C. A cold fluid enters the heat exchanger at 40°C. The mean temperature difference between the two fluids is 60°C 20°C 66.7°C 40°C 60°C 20°C 66.7°C 40°C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by Radiation Convection Free convection Forced convection Radiation Convection Free convection Forced convection ANSWER DOWNLOAD EXAMIANS APP
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