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. Hot body to cold body Larger body to smaller body Cold body to hot body Smaller body to larger body Hot body to cold body Larger body to smaller body Cold body to hot body Smaller body to larger body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called Stefan's law First law of thermodynamics Newton's law of cooling Newton's law of heating Stefan's law First law of thermodynamics Newton's law of cooling Newton's law of heating ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by Free convection Convection Forced convection Radiation Free convection Convection Forced convection Radiation ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called Absorptive power None of these Emissivity Emissive power Absorptive power None of these Emissivity Emissive power ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In free convection heat transfer, Nusselt number is function of Prandtl number and Reynold number Grashoff number and Prandtl number Grashoff number and Reynold number Grashoff number, Prandtl number and Reynold number Prandtl number and Reynold number Grashoff number and Prandtl number Grashoff number and Reynold number Grashoff number, Prandtl number and Reynold number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The rate of energy transferred by convection to that by conduction is called Biot number Nusselt number Stanton number Peclet number Biot number Nusselt number Stanton number Peclet number ANSWER DOWNLOAD EXAMIANS APP
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