Heat and Mass Transfer An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m²). The critical thickness of insulation will be 800 mm 25 mm 40 mm 160 mm 800 mm 25 mm 40 mm 160 mm ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of surface convection resistance to the internal conduction resistance is known as Grashoff number Stanton number Biot number Prandtl number Grashoff number Stanton number Biot number Prandtl number 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, The better insulation must be put inside 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 outside The better insulation must be put inside 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 outside ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Sensible heat is the heat required to Change liquid into vapour Increase the temperature of a liquid of vapour Convert water into steam and superheat it Change vapour into liquid Change liquid into vapour Increase the temperature of a liquid of vapour Convert water into steam and superheat it Change vapour into liquid 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 20°C 40°C 66.7°C 60°C 20°C 40°C ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Unit of thermal diffusivity is kcal/m. hr °C m²/hr kcal/m² hr m²/hr °C kcal/m. hr °C m²/hr kcal/m² hr m²/hr °C ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS