Heat and Mass Transfer According of Kirchhoff's law Radiant heat is proportional to fourth power of absolute temperature Emissive power and absorptivity are constant for all bodies Emissive power depends on temperature Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body Radiant heat is proportional to fourth power of absolute temperature Emissive power and absorptivity are constant for all bodies Emissive power depends on temperature Ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Moisture would find its way into insulation by vapour pressure unless it is prevented by High thickness of insulation High vapour pressure A vapour seal Less thermal conductivity insulator High thickness of insulation High vapour pressure A vapour seal Less thermal conductivity insulator ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Log mean temperature difference in case of counter flow compared to parallel flow will be Less Depends on other factors Same More Less Depends on other factors Same More ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of water at 20°C is of the order of 0.1 0.23 0.42 0.51 0.1 0.23 0.42 0.51 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is Equal to Nusselt number Greater than one Less than one Equal to one Equal to Nusselt number Greater than one Less than one Equal to one ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Joule sec is the unit of Planck's constant Universal gas constant Thermal conductivity Kinematic viscosity Planck's constant Universal gas constant Thermal conductivity Kinematic viscosity ANSWER DOWNLOAD EXAMIANS APP
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