Heat Transfer Fourier's law of heat conduction applies to __________ surfaces. Non-isothermal Neither A and B Isothermal Both A and B Non-isothermal Neither A and B Isothermal Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid. Surface area to volume Surface area to perimeter Volume to surface area Perimeter to surface area Surface area to volume Surface area to perimeter Volume to surface area Perimeter to surface area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Graetz number is concerned with the heat transfer in laminar flow mass transfer between a gas and a liquid absorption with chemical reaction heat transfer in turbulent flow heat transfer in laminar flow mass transfer between a gas and a liquid absorption with chemical reaction heat transfer in turbulent flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law. Kirchoffs Dalton's Wien's Stefan's Kirchoffs Dalton's Wien's Stefan's 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 0.15 0.55 55.5 555 0.15 0.55 55.5 555 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the Evaporators opreate at atmospheric pressure Solution has an elevation of boiling point Evaporators operate under vacuum None of these Evaporators opreate at atmospheric pressure Solution has an elevation of boiling point Evaporators operate under vacuum None of these ANSWER DOWNLOAD EXAMIANS APP
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