Heat and Mass Transfer Thermal diffusivity of a substance is Directly proportional to the thermal conductivity All of these Inversely proportional to density of substance Inversely proportional to specific heat Directly proportional to the thermal conductivity All of these Inversely proportional to density of substance Inversely proportional to specific heat ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The emissive power of a body depends upon its All of these Physical nature Wave length Temperature All of these Physical nature Wave length Temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Sensible heat is the heat required to Change vapour into liquid Change liquid into vapour Convert water into steam and superheat it Increase the temperature of a liquid of vapour Change vapour into liquid Change liquid into vapour Convert water into steam and superheat it Increase the temperature of a liquid of vapour 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 The better insulation must be put outside The better insulation must be put inside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put outside The better insulation must be put inside One could place either insulation on either side ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Film coefficient is defined as Inside diameter of tube Equivalent thickness of film Film coefficient × Inside diameter Thermal conductivity Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity Thermal conductivity Equivalent thickness of film Specific heat × Viscosity Equivalent thickness of film Film coefficient × Inside diameter Thermal conductivity Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity Thermal conductivity Equivalent thickness of film Specific heat × Viscosity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The value of Prandtl number for air is about 1.7 0.1 0.7 0.3 1.7 0.1 0.7 0.3 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS