Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Its evaporation loss Uneconomic LMTD Decrease in heat exchanger efficiency Excessive corrosion Its evaporation loss Uneconomic LMTD Decrease in heat exchanger efficiency Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is More More or less; depends on the nature of solution Same Less More More or less; depends on the nature of solution Same Less ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal boundary layer at NPr > 1 Disappears Is thinner than hydrodynamic boundary layer Is thicker than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical Disappears Is thinner than hydrodynamic boundary layer Is thicker than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number) NPr-1/3 NPr NPr-1 NPr1/3 NPr-1/3 NPr NPr-1 NPr1/3 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer co-efficient (h1) for liquids increases with None of these Decreasing temperature Decreasing Reynolds number Increasing temperature None of these Decreasing temperature Decreasing Reynolds number Increasing temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The purpose of providing a 'catchall' in the vapor line of an evaporator is to Regulate the vapor flow Create vacuum Vent the non-condensible gases Arrest the entrained liquid Regulate the vapor flow Create vacuum Vent the non-condensible gases Arrest the entrained liquid ANSWER DOWNLOAD EXAMIANS APP
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