As compared with grinding an unhardened workpiece of the same material, what change in the selection of the grinding wheel would be desireable for grinding the workpiece in a hardened condition?
A) A different type of abrasive is indicated, such as silicon carbide instead of aluminum oxide
B) The grinding wheel selection should be one grade softer
C) No change in wheel bonding is desired
D) The grinding wheel selection should be one grade harder
B
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