Heat and Mass Transfer The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is Greater than one Equal to Nusselt number Equal to one Less than one Greater than one Equal to Nusselt number Equal to one Less than one ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Newton's law of cooling, the heat transfer from a hot body to a cold body is Both (A) and (B) Either (A) or (B) Directly proportional to the surface area Directly proportional to the difference of temperatures between the two bodies Both (A) and (B) Either (A) or (B) Directly proportional to the surface area Directly proportional to the difference of temperatures between the two bodies ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The unit of Stefan Boltzmann constant is watt/cm4 °K watt/cm2 °K⁴ watt/cm3 °K watt2/cm °K⁴ watt/cm4 °K watt/cm2 °K⁴ watt/cm3 °K watt2/cm °K⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A perfect black body is one which Is black in colour Absorbs heat radiations of all wave lengths falling on it Reflects all heat Transmits all heat radiations Is black in colour Absorbs heat radiations of all wave lengths falling on it Reflects all heat Transmits all heat radiations ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In case of liquids and gases, the heat transfer takes place according to Convection Radiation Conduction None of these Convection Radiation Conduction None of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by Both convection and conduction Convection Radiation Conduction Both convection and conduction Convection Radiation Conduction ANSWER DOWNLOAD EXAMIANS APP
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