Heat Transfer Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is Thin walled having the value of Ao Ai/< 2 Having the value of Ao/Ai > 2 Both B and C Thick walled Thin walled having the value of Ao Ai/< 2 Having the value of Ao/Ai > 2 Both B and C Thick walled ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is Dependent on NRe only 1.66 3.66 88.66 Dependent on NRe only 1.66 3.66 88.66 ANSWER DOWNLOAD EXAMIANS APP
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 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 Constant temperature equal to that of the base Average temperature of the fin ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe? 0.5 > 0.6 < 0.1 < 0.5 0.5 > 0.6 < 0.1 < 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it Occupies smaller space Is easy to operate and maintain All of these Is more economical Occupies smaller space Is easy to operate and maintain All of these Is more economical ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The number of kg vaporised per kg of steam fed to the evaporator is defined as Capacity Economy Rate of vaporisation Rate of evaporation Capacity Economy Rate of vaporisation Rate of evaporation ANSWER DOWNLOAD EXAMIANS APP
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