Heat and Mass Transfer In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in Parallel flow Cross flow Counter flow All of these Parallel flow Cross flow Counter flow All of these ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as Kirchhoff's law Planck's law Stefan's law Wien's law Kirchhoff's law Planck's law Stefan's law Wien's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A perfect black body is one which Reflects all heat Absorbs heat radiations of all wave lengths falling on it Is black in colour Transmits all heat radiations Reflects all heat Absorbs heat radiations of all wave lengths falling on it Is black in colour Transmits all heat radiations ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The unit of Stefan Boltzmann constant is watt2/cm °K⁴ watt/cm4 °K watt/cm3 °K watt/cm2 °K⁴ watt2/cm °K⁴ watt/cm4 °K watt/cm3 °K watt/cm2 °K⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Metals are good conductors of heat because Their atoms collide frequently They have high density They contain free electrons Their atoms are relatively far apart Their atoms collide frequently They have high density They contain free electrons Their atoms are relatively far apart ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of heat flow through a body by conduction is Directly proportional to the temperature difference on the two faces of the body Dependent upon the material of the body All of these Directly proportional to the surface area of the body Directly proportional to the temperature difference on the two faces of the body Dependent upon the material of the body All of these Directly proportional to the surface area of the body ANSWER DOWNLOAD EXAMIANS APP
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