The main size reduction operation in ultrafine grinders is_____________?
Correct answer: B. Attrition
- A. Cutting
- B. Attrition
- C. Compression
- D. Impact
Explanation
Ultrafine grinding requires particles to rub against one another or the grinding surface, so attrition is the dominant mechanism. Compression and impact are more important in coarse and intermediate size reduction.
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