Heat and Mass Transfer Cork is a good insulator because it has Free electrons Atoms colliding frequency Low density Porous body Free electrons Atoms colliding frequency Low density Porous body 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 Forced convection Radiation Convection Free convection Forced convection Radiation Convection ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature. Maximum energy Both (A) and (B) None of these Minimum energy Maximum energy Both (A) and (B) None of these Minimum energy ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called Thermal resistance Thermal coefficient Temperature gradient Thermal conductivity Thermal resistance Thermal coefficient Temperature gradient Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Prevost theory of heat exchange It is impossible to transfer heat from low temperature source to t high temperature source All bodies above absolute zero emit radiation Heat transfer in most of the cases takes place by combination of conduction, convection and radiation Heat transfer by radiation requires no medium It is impossible to transfer heat from low temperature source to t high temperature source All bodies above absolute zero emit radiation Heat transfer in most of the cases takes place by combination of conduction, convection and radiation Heat transfer by radiation requires no medium ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a Brilliant white polished body Red hot body Grey body Black body Brilliant white polished body Red hot body Grey body Black body ANSWER DOWNLOAD EXAMIANS APP
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