Heat Transfer The thermal boundary layer at NPr > 1 Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer Disappears And the hydrodynamic boundary layer are identical Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer Disappears And the hydrodynamic boundary layer are identical ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 20 minutes 10 minutes 40 minutes 5 minutes 20 minutes 10 minutes 40 minutes 5 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Baffles are provided in heat exchangers to increase the Heat transfer area Heat transfer co-efficient Fouling factor Heat transfer rate Heat transfer area Heat transfer co-efficient Fouling factor Heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Crystallisation of solids from a homogeneous solution is a/an __________ process. Exothermic Highly endothermic Mildly endothermic None of these Exothermic Highly endothermic Mildly endothermic None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The separation of liquid droplets from the vapor is done by a/an __________ , in the evaporators. Compressor Vacuum pump Steam ejector Entrainment separator Compressor Vacuum pump Steam ejector Entrainment separator ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which area is used in case of heat flow by conduction through a cylinder ? Geometric mean area Arithmetic mean area None of the listed here Logarithmic mean area Geometric mean area Arithmetic mean area None of the listed here Logarithmic mean area ANSWER DOWNLOAD EXAMIANS APP
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