Heat and Mass Transfer Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium. Larger body to smaller body Smaller body to larger body Hot body to cold body Cold body to hot body Larger body to smaller body Smaller body to larger body Hot body to cold body Cold body to hot body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat transfer takes place as per Zeroth law of thermodynamics First law of thermodynamic Kirchoff's law Second law of the thermodynamics Zeroth law of thermodynamics First law of thermodynamic Kirchoff's law Second law of the thermodynamics 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 Two One Three Four Two One Three Four ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Absorptivity of a body will be equal to its emissivity At critical temperature At all temperatures When system is under thermal equilibrium At one particular temperature At critical temperature At all temperatures When system is under thermal equilibrium At one particular temperature 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 Stefan's law Planck's law Kirchhoff's law Wien's law Stefan's law Planck's law Kirchhoff's law Wien's law ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The product of Reynolds number and Prandtl number is known as Stanton number Biot number Peclet number Grashoff number Stanton number Biot number Peclet number Grashoff number ANSWER DOWNLOAD EXAMIANS APP
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