Heat Transfer The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns. 0.5-50 5-50 100-1000 0.38-0.78 0.5-50 5-50 100-1000 0.38-0.78 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is 150 125 133 160 150 125 133 160 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which type of heat exchanger is preferred for heavy heat loads ? None of the listed here Double pipe Plate fine Series and parallel set of shell and tube None of the listed here Double pipe Plate fine Series and parallel set of shell and tube ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is Nusselt number Schmidt number Stanton number Sherwood number Nusselt number Schmidt number Stanton number Sherwood number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, Provide very large heat transfer co-efficient Results in abruptly increased velocity None of these Results in making part of the heating surface inactive Provide very large heat transfer co-efficient Results in abruptly increased velocity None of these Results in making part of the heating surface inactive ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Concentrate heat sensitive materials Achieve very high concentration of the final product Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Concentrate heat sensitive materials Achieve very high concentration of the final product Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam ANSWER DOWNLOAD EXAMIANS APP
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