Heat and Mass Transfer Thermal diffusivity is Used as mathematical model A dimensionless parameter Function of temperature A physical property of the material Used as mathematical model A dimensionless parameter Function of temperature A physical property of the material ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The critical temperature is the temperature Above which a gas may explode Below which a gas does not obey gas laws Above which a gas will never liquefied Below which a gas is always liquefied Above which a gas may explode Below which a gas does not obey gas laws Above which a gas will never liquefied Below which a gas is always liquefied ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer According to Stefan's law, the total radiation from a black body per second per unit area is proportional to T5 Absolute temperature T2 T T5 Absolute temperature T2 T 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 Red hot body Black body Brilliant white polished body Grey body Red hot body Black body Brilliant white polished body Grey body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Which of the following is the case of heat transfer by radiation? Heating of building Cooling of parts in furnace Heat received by a person from fireplace Blast furnace Heating of building Cooling of parts in furnace Heat received by a person from fireplace Blast furnace ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of 9 270 81 3 9 270 81 3 ANSWER DOWNLOAD EXAMIANS APP