A particular coal is said to be free burning when it __________________?
Correct answer: C. Shows little or no fusing action
- A. Burns completely
- B. Gives smokeless burning
- C. Shows little or no fusing action
- D. None of these
Explanation
Free-burning coal burns readily because it undergoes little or no softening and fusion during heating. Fusing coals instead form a plastic mass and can restrict air passage.
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