In a muffle furnace, the muffle_________________?
Correct answer: D. All A., B. and C.
- A. Retards the heat transfer
- B. Assists in temperature equalisation in the charge
- C. Permits the use of controlled atmosphere for the protection of stock
- D. All A., B. and C.
Explanation
A muffle separates the stock from direct flame contact, allowing a controlled protective atmosphere, more uniform temperature distribution, and moderated heat transfer. Since all three listed functions apply, the combined option is correct.
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