Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = k/h r = 2k/h r = k/2h r = h/k r = k/h r = 2k/h r = k/2h r = h/k ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m².K. The Biot number is 5.6 3.5 0.025 0.0035 5.6 3.5 0.025 0.0035 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Increases Remains constant Decreases May increase or decrease ; depends on the material Increases Remains constant Decreases May increase or decrease ; depends on the material 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 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 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 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation. Is same as Half Greater than Lower than Is same as Half Greater than Lower than ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Correction is applied to LMTD for __________ flow. Parallel None of these Cross Counter Parallel None of these Cross Counter ANSWER DOWNLOAD EXAMIANS APP
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