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 Thermal diffusivity is a Dimensionless parameter Function of temperature Physical property of a substance All of these Dimensionless parameter Function of temperature Physical property of a substance 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 Planck's law Kirchhoff's law Stefan's law Wien's law Planck's law Kirchhoff's law Stefan's law Wien's law 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 difference of temperatures between the two bodies Directly proportional to the surface area Both (A) and (B) Either (A) or (B) Directly proportional to the difference of temperatures between the two bodies Directly proportional to the surface area ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The total radiation from a black body per second per unit area is ________ fourth power of the absolute temperature. This statement is known as Stefan Boltzmann law. Inversely proportional to Directly proportional to None of these Equal to Inversely proportional to Directly proportional to None of these Equal to ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be Four One Two Three Four One Two Three ANSWER DOWNLOAD EXAMIANS APP
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