Heat Transfer Choose the most important factor on which the heat conducted through a wall in a unit time will depend on? Material of the wall Thickness of the wall Area of the wall perpendicular to heat flow Temperature difference between the two surfaces of the wall Material of the wall Thickness of the wall Area of the wall perpendicular to heat flow Temperature difference between the two surfaces of the wall ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is 125 150 160 133 125 150 160 133 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by Forced convection Transient conduction Steady state conduction Natural convection Forced convection Transient conduction Steady state conduction Natural convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer It is not preferable to use superheated steam in evaporators, because of its very high pressure low film co-efficient none of the listed here high temperature high pressure low film co-efficient none of the listed here high temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With the increase of temperature, the Col-burn jH factor Increases Remains unchanged May increase or decrease ; depending on temperature Decreases Increases Remains unchanged May increase or decrease ; depending on temperature Decreases 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 Constant temperature equal to that of the base Temperature of the fin end Average temperature of the fin Surrounding temperature Constant temperature equal to that of the base Temperature of the fin end Average temperature of the fin Surrounding temperature ANSWER DOWNLOAD EXAMIANS APP
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