For radiant heating around 2250°C, the heating elements are made of____________?
Correct answer: C. tungsten alloy
- A. copper alloy
- B. carbon
- C. tungsten alloy
- D. stainless steel alloy
Explanation
Tungsten-alloy elements can withstand temperatures around 2250°C because tungsten has a very high melting point and retains strength at elevated temperatures. Copper and stainless-steel alloys soften or melt at much lower temperatures.
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