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 Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature Temperature of the fin end Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Calburn analogy is applicable for the value of Prandtl number from 0.6 to 120 0.5 to 5 0.001 to 1 120 to 400 0.6 to 120 0.5 to 5 0.001 to 1 120 to 400 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer jH factor for heat transfer depends upon the __________ number. Nusselt Reynolds Biot Prandtl Nusselt Reynolds Biot Prandtl ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a perfectly transparent surface (like gases), the Reflectivity = 0 All of these Absorptivity = 0 Transmissivity = 1 Reflectivity = 0 All of these Absorptivity = 0 Transmissivity = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area Decreases Remains constant Passes through a maxima Increases Decreases Remains constant Passes through a maxima Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has Higher solute concentration in the product Lower steam economy Lower heat transfer area Higher steam economy Higher solute concentration in the product Lower steam economy Lower heat transfer area Higher steam economy ANSWER DOWNLOAD EXAMIANS APP
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