Heat Transfer Heat exchangers operating, when the asymptotic range is reached, 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 Provide very large heat transfer co-efficient Results in abruptly increased velocity None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dietus-Boelter equation cannot be used for molten metals mainly due to its very low viscosity thermal conductivity Grashoff number Prandtl number viscosity thermal conductivity Grashoff number Prandtl number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 287 W/m².K 1200W/m².K 333W/m².K 894W/m².K 287 W/m².K 1200W/m².K 333W/m².K 894W/m².K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has Higher steam economy Lower heat transfer area Higher solute concentration in the product Lower steam economy Higher steam economy Lower heat transfer area Higher solute concentration in the product Lower steam economy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical? 1.5 1 0.5 80 1.5 1 0.5 80 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by None of these Increasing the tube length Keeping the heat transfer surface clean Enhancing the fluid pumping rate None of these Increasing the tube length Keeping the heat transfer surface clean Enhancing the fluid pumping rate ANSWER DOWNLOAD EXAMIANS APP
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