Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?
Correct answer: D. 100
- A. 50
- B. 70
- C. 85
- D. 100
Explanation
The Hardgrove Grindability Index increases as coal becomes easier to pulverise. Hence, the sample with an index of 100 is the easiest to grind.
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