64-132) rank coal (ASTM) means a coal with 64%___________________?
Correct answer: C. Fixed carbon and having a heating value around 13, 200 BTU/1b
- A. Fixed carbon and heating value around 132 BTU/1b
- B. Ash and heating value around 13, 200 BTU/1b
- C. Fixed carbon and having a heating value around 13, 200 BTU/1b
- D. None of these
Explanation
The ASTM coal-rank notation 64-132 indicates approximately 64% fixed carbon and a heating value near 13,200 Btu/lb. The second number is a heating-value index, not an ash percentage.
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