Answer the multiple choice questions below

1. The heat transfer rate inside a composite wall consisting of multiple layers at steady state with internal generation of heat can be expressed as: a. The difference in temperature between the two outside surfaces of the wall divided by the sum of all resistances in all layers b. The heat transfer rate inside any of these layers c. All of the above d. None of the above 2. At steady state with no heat generation, the heat flux in the radial direction inside a sphere: a. Is constant b. Increases as the radius increases c. Decreases as the radius increases d. None of the above 3. In steady state conduction through a material in which heat is generated or consumed, the heat transfer rate: a. Is constant throughout the material b. Varies at different locations within the material c. Depends on time and location d. None of the above