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 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 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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In the equation Q = UAΔt; Δt is Logarithmic mean temperature difference Arithmetic mean temperature difference Geometric mean temperature difference The difference of average bulk temperatures of hot and cold fluids Logarithmic mean temperature difference Arithmetic mean temperature difference Geometric mean temperature difference The difference of average bulk temperatures of hot and cold fluids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes. >10 10 Either B or C, depends on the mass of the body >10 10 Either B or C, depends on the mass of the body ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Graetz number is given by kμ/mCp mCp/kL kL/mCp mCp/kμ kμ/mCp mCp/kL kL/mCp mCp/kμ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is Higher shell side heat transfer co-efficient Lower tube side pressure drop Lower shell side pressure drop Higher tube side heat transfer co-efficient Higher shell side heat transfer co-efficient Lower tube side pressure drop Lower shell side pressure drop Higher tube side heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Choose the correct equation. Nu = (Pr)(St) Nu = (Re)(Pr) Nu = (Re) (Pr) (St) Nu = (Re) (Pr) (Gz) Nu = (Pr)(St) Nu = (Re)(Pr) Nu = (Re) (Pr) (St) Nu = (Re) (Pr) (Gz) ANSWER DOWNLOAD EXAMIANS APP
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