Difficulty: Easy
Correct Answer: True — fine grain is preferred for hard materials
Explanation:
Guideline
For hard materials, a softer grade wheel with finer grain is typically used to maintain sharp cutting points and achieve good finish without excessive loading.
Contrast
For soft/tough materials, coarser grains help prevent wheel loading and allow higher material removal.
Final Answer
True — fine-grained wheel is used for hard materials.
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