Heat Transfer Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer. Biot Stantan Reynolds Grashoff Biot Stantan Reynolds Grashoff 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 55.5 0.55 555 0.15 55.5 0.55 555 0.15 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, The relationship is not generalised The temperature drops in the two fluids and the wall are proportional to individual resistances The temperature drop is inversely proportional to the resistance across which the drop occurs There is no relationship between temperature drop and resistance The relationship is not generalised The temperature drops in the two fluids and the wall are proportional to individual resistances The temperature drop is inversely proportional to the resistance across which the drop occurs There is no relationship between temperature drop and resistance 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 Heating volume None of these Heat transfer area Nusselt number Heating volume None of these Heat transfer area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Analogy between mass and heat transfer is not applicable in case of Thermal or pressure mass diffusion Viscous heating or chemical reaction Both B and C Same velocity profile or equal eddy diffusivities Thermal or pressure mass diffusion Viscous heating or chemical reaction Both B and C Same velocity profile or equal eddy diffusivities ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator. Falling film High pressure Long tube None of these Falling film High pressure Long tube None of these ANSWER DOWNLOAD EXAMIANS APP
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