A furnace wall consists of four layers of different materials, M1, M2, M3 and M4. If the layers are of equal thickness and the steady state temperature profiles is as shown below, then the material with the lowest thermal conductivity is
A. M1
B. M2
C. M3
D. M4
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Miscellaneous In Metallurgy
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