Heat and Mass Transfer The emissivity for a black body is 0.5 0.75 1 0.5 0.75 1 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature. None of these Maximum energy Both (A) and (B) Minimum energy None of these Maximum energy Both (A) and (B) Minimum energy ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat is transferred by all three modes of transfer, viz. conduction, convection and radiation in Steam condenser Boiler Refrigerator condenser coils Electric heater Steam condenser Boiler Refrigerator condenser coils Electric heater 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 66.7°C 60°C 40°C 20°C 66.7°C 60°C 40°C 20°C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In counter current flow heat exchanger, the logarithmic temperature difference between the fluids is ________ as compared to parallel flow heat exchanger. None of these Greater Same Less None of these Greater Same Less ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Metals are good conductors of heat because Their atoms are relatively far apart They have high density They contain free electrons Their atoms collide frequently Their atoms are relatively far apart They have high density They contain free electrons Their atoms collide frequently ANSWER DOWNLOAD EXAMIANS APP
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