Saved Bookmarks
| 1. |
The temperature drop through a two layer furnace wall is `600^(@)C`. Each layer is of equal area of cross section. Which of the following actions will result in lowering the temperature `theta` of the interface ? A. By increasing the thermal conductivity of inner layer.B. By increasig the thermal conductivity of outer layerC. By increasing thickness of water layerD. By decreasing thickness of inner layer |
|
Answer» Correct Answer - A::B::D In steady state, `(K_(1) A (1000 - theta))/(L_(1))` `= (K_(2) A (theta - 400))/(L_(2))` `1000 (K_(1))/(L_(1)) - (K_(1))/(L_(1)) thetya = (K_(2) theta)/(L_(2)) - 400 (K_(2))/(L_(2))` `theta = (1000(K_(1))/(L_(1)) + 400 (K_(2))/(L_(2)))/((K_(1))/(L_(1)) + (K_(2))/(L_(2)))` |
|