For grinding of softer materials, the grinding wheel should have _________________ grain size ?
Correct answer: D. Coarser
- A. Finer
- B. Any type of
- C. Medium
- D. Coarser
Explanation
Soft materials tend to clog or load a grinding wheel, so larger, coarser grains provide more open space for chip removal and reduce clogging. Fine grains are more suitable for hard materials and finishing operations.
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