Heat Transfer Which of the following situations can be approximated to a steady state heat transfer system? A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric 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 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 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 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 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 Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Rate of crystallisation does not depend upon the Number and active surface area of the crystals Extent of supersaturation Turbulence within the solution None of these Number and active surface area of the crystals Extent of supersaturation Turbulence within the solution None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a cooling tower, water becomes cool by Vaporisation due to heat loss to air Loosing latent heat Heat transfer to surroundings Loosing sensible heat Vaporisation due to heat loss to air Loosing latent heat Heat transfer to surroundings Loosing sensible heat ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal boundary layer at NPr > 1 Disappears Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical Disappears Is thicker than hydrodynamic boundary layer Is thinner than hydrodynamic boundary layer And the hydrodynamic boundary layer are identical ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Film boiling is usually not desired in commercial equipments, because it is difficult to maintain the heat transfer rate is low in view of the large temperature drop. @ it is not economic none of the listed here it is difficult to maintain the heat transfer rate is low in view of the large temperature drop. @ it is not economic none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) E/C 1/CE CE C/E E/C 1/CE CE C/E ANSWER DOWNLOAD EXAMIANS APP