Which of the following will happen if the thickness of refractory wall of furnace is increased ?
Correct answer: C. Temperature on the outer surface of furnace walls will drop
- A. Heat loss through furnace wall will increase
- B. Temperature inside the furnace will fall
- C. Temperature on the outer surface of furnace walls will drop
- D. Energy consumption will increase
Explanation
Increasing refractory thickness increases thermal resistance, reducing heat flow and lowering the temperature reached at the outer wall surface. Thus the outer surface becomes cooler, although furnace start-up may take longer.
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