Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 0 and 0.5 1 and 0 0 and 1 1 and ? 0 and 0.5 1 and 0 0 and 1 1 and ? ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the Nusselt number None of these Heating volume Heat transfer area Nusselt number None of these Heating volume Heat transfer area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the emissivity of a black body? 0.9 1 0.5 0.9 1 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances. Sum Geometric mean Product Average Sum Geometric mean Product Average ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of momentum diffusivity to thermal diffusivity is the __________ number. Nusselt Grashoff Stanton Prandtl Nusselt Grashoff Stanton Prandtl ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Low thermal conductivity of heat insulating materials is due to its Dense structure None of these High proportion of air space High specific heat Dense structure None of these High proportion of air space High specific heat ANSWER DOWNLOAD EXAMIANS APP
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