Heat Transfer An insulator should have High thermal conductivity A porous structure Low thermal conductivity Less resistance to heat flow High thermal conductivity A porous structure Low thermal conductivity Less resistance to heat flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m³ and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m².K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is 555 0.15 0.55 55.5 555 0.15 0.55 55.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer According to Reynolds analogy, Stanton number is equal to f/4 f 2f f/2 f/4 f 2f f/2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation of steam on cooling surface is promoted Only in presence of air An oily surface When both the steam and the tube are clean None of these Only in presence of air An oily surface When both the steam and the tube are clean None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate per unit area is called thermal conductivity heat transfer co-efficient thermal diffusivity heat flux thermal conductivity heat transfer co-efficient thermal diffusivity heat flux ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Duhring's plot' is of use in Extractive distillation Absorption Evaporation Leaching Extractive distillation Absorption Evaporation Leaching ANSWER DOWNLOAD EXAMIANS APP
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