A good quality coal should have ___________________?
Correct answer: D. None of these
- A. Low fusion point of ash
- B. High ash content
- C. High sulphur
- D. None of these
Explanation
A good coal should have low ash and sulphur and ash with a high fusion temperature, so that ash does not form troublesome deposits or slag. Since option A says low fusion point and B and C are undesirable, none of these is correct.
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