The fuel ratio of a coal is__________________?
Correct answer: C. Both A. and B.
- A. The ratio of its percentage of fixed carbon to that of volatile matter
- B. Helpful in estimation of its rank
- C. Both A. and B.
- D. Neither A. nor B.
Explanation
Fuel ratio is defined as the percentage of fixed carbon divided by the percentage of volatile matter on the same basis. Because this ratio generally rises with coal rank, it is also useful for estimating rank, making both statements correct.
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