The bright glow of a combustion process is the characteristic of ______________ temperature oxidation of coal?
Correct answer: A. Fast & high
- A. Fast & high
- B. Slow & low
- C. Slow & high
- D. Fast & slow
Explanation
A bright glow indicates rapid oxidation releasing heat at a high temperature, with incandescent carbon or ash particles emitting visible radiation. Slow, low-temperature oxidation does not produce this characteristic glow.
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