Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by None of these Keeping the heat transfer surface clean Enhancing the fluid pumping rate Increasing the tube length None of these Keeping the heat transfer surface clean Enhancing the fluid pumping rate Increasing the tube length ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.) X/KA K/Ax KA/x A/Kx X/KA K/Ax KA/x A/Kx ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a boiling curve, the peak heat flux is called the __________ point. Leidenfrost Nusselt Burnout Boiling Leidenfrost Nusselt Burnout Boiling ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids? None of these When fluid flows past a smooth surface At low velocity At high fluid velocity None of these When fluid flows past a smooth surface At low velocity At high fluid velocity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer It is not preferable to use superheated steam in evaporators, because of its very none of the listed here high temperature high pressure low film co-efficient none of the listed here high temperature high pressure low film co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following situations can be approximated to a steady state heat transfer system? 10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C 10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C ANSWER DOWNLOAD EXAMIANS APP
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