Heat Transfer For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it Decreases the outlet temperature of cooling medium None of these Decreases the pressure drop Increases the overall heat transfer coefficient Decreases the outlet temperature of cooling medium None of these Decreases the pressure drop Increases the overall heat transfer coefficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Forced circulation evaporators are normally used for concentrating liquids having Scaling characteristics Neither A nor B High viscosity Both A & B Scaling characteristics Neither A nor B High viscosity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal boundary layer at NPr > 1 Is thinner than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical Is thicker than hydrodynamic boundary layer Disappears Is thinner than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical Is thicker than hydrodynamic boundary layer Disappears ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The unit of heat transfer co-efficient in SI unit is J/m°K W/m°K W/m2°K J/M2°K J/m°K W/m°K W/m2°K J/M2°K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following situations can be approximated to a steady state heat transfer system? Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°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 A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric 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 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 A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? 1 to 103 l to 50 0.6 to 120 0.06 to 120 1 to 103 l to 50 0.6 to 120 0.06 to 120 ANSWER DOWNLOAD EXAMIANS APP
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