A refractory wall separating the stock and the source of heat is provided in a__________________?
Correct answer: B. Muffle furnace
- A. Updraft kiln
- B. Muffle furnace
- C. Continuous furnace
- D. None of these
Explanation
In a muffle furnace, a refractory muffle wall lies between the stock and the combustion gases or heat source. This prevents direct contact while allowing heat to reach the charge.
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