engineering recuitment AAI JE Technical Mock Test 2020-21 Heat Transfer Conduction Heat Conduction Through Plane and Composite Walls
Consider one-dimensional steady-state heat conduction, without heat generation, in a plane wall; with boundary conditions as shown in the figure below. The conductivity of the wall is given by k = k0 + bT; where k0 and b are positive constants and T is temperature.
As x increases, the temperature gradient (dT/dx) will
1
Remain constant
2
Be zero
3
Increase
4
Decrease