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 0.0035 3.5 0.025 5.6 0.0035 3.5 0.025 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a vertical tube evaporator, with increase in the liquor level, the __________ is increased. Both A and B Neither A and B Velocity of circulation Liquor-film co-efficient Both A and B Neither A and B Velocity of circulation Liquor-film co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air inside and steam outside Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air on shell side and steam inside tubes Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air inside and steam outside Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air on shell side and steam inside tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Shell side pressure drop in a shell and tube heat exchanger does not depend upon the Baffle spacing & shell diameter None of these Tube diameter & pitch Viscosity, density & mass velocity of shell side fluid Baffle spacing & shell diameter None of these Tube diameter & pitch Viscosity, density & mass velocity of shell side fluid ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In counter flow compared to parallel flow, Less surface area is required for a given heat transfer rate LMTD is greater More surface area is required for a given heat transfer rate Both A and B Less surface area is required for a given heat transfer rate LMTD is greater More surface area is required for a given heat transfer rate Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Analogy between mass and heat transfer is not applicable in case of Same velocity profile or equal eddy diffusivities Viscous heating or chemical reaction Both B and C Thermal or pressure mass diffusion Same velocity profile or equal eddy diffusivities Viscous heating or chemical reaction Both B and C Thermal or pressure mass diffusion ANSWER DOWNLOAD EXAMIANS APP
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