Maximum size reduction in a ball mill is done by the, ______________ action?
Correct answer: C. Impact
- A. Attrition
- B. Compression
- C. Impact
- D. Cutting
Explanation
In a ball mill, the balls are lifted and then fall onto the particles, producing impact that causes much of the size reduction. Attrition also occurs, especially during finer grinding, but impact is the principal action for maximum reduction.
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