Heat and Mass Transfer According to Stefan Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the Absolute temperature Fourth power of the absolute temperature Square of the absolute temperature Cube of the absolute temperature Absolute temperature Fourth power of the absolute temperature Square of the absolute temperature Cube of the absolute temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The product of Reynolds number and Prandtl number is known as Stanton number Peclet number Grashoff number Biot number Stanton number Peclet number Grashoff number Biot number 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 66.7°C 20°C 40°C 60°C 66.7°C 20°C 40°C 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 According to Wien's law, the wavelength corresponding to maximum energy is proportion to T F I² Absolute temperature (T) T F I² Absolute temperature (T) ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Prevost theory of heat exchange Heat transfer in most of the cases takes place by combination of conduction, convection and radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source All bodies above absolute zero emit radiation Heat transfer in most of the cases takes place by combination of conduction, convection and radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source All bodies above absolute zero emit radiation ANSWER DOWNLOAD EXAMIANS APP
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