Heat Transfer Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the Constant temperature equal to that of the base Average temperature of the fin Temperature of the fin end Surrounding temperature Constant temperature equal to that of the base Average temperature of the fin Temperature of the fin end Surrounding temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is Mainly confined to a thin film of fluid near the surface None of these Uniformly distributed throughout the fluid In the central core of the fluid Mainly confined to a thin film of fluid near the surface None of these Uniformly distributed throughout the fluid In the central core of the fluid ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called Conduction Natural convection Radiation Forced convection Conduction Natural convection Radiation Forced convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A perfect black body is a perfect __________ of radiation absorber Both emitter & absorber emitter none of the listed here absorber Both emitter & absorber emitter none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer jH factor for heat transfer is not a function of the __________ number. Both B & C Nusselt Grashoff Reynolds Both B & C Nusselt Grashoff Reynolds ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If Prandtl number is greater than the Schmidt number, then the thermal boundary layer lies inside the concentration boundary layer concentration boundary layer lies inside the thermal boundary layer none of the listed here thermal & concentration boundary layers are of equal thickness thermal boundary layer lies inside the concentration boundary layer concentration boundary layer lies inside the thermal boundary layer none of the listed here thermal & concentration boundary layers are of equal thickness ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS