Which of the following zones is used for melting alloy during casting______________?
Correct answer: A. Reducing flame
- A. Reducing flame
- B. Oxidizing flame
- C. Green flame
- D. All of the above
Explanation
The reducing zone of the flame is used for melting casting alloys because it limits oxidation of the molten metal. An oxidizing flame promotes oxide formation and is therefore unsuitable for this purpose.
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