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← TechnologyWhich outcome occurs in precision surface grinding when excessive downfeed rates are applied during a finishing pass?
A)Workpiece thermal distortion increases✓
B)Wheel wear rate decreases sharply
C)Grinding lubricant viscosity rises
D)Surface finish improves noticeably
💡 Explanation
Increased downfeed causes higher frictional heat between the grinding wheel and the workpiece, which leads to increased thermal distortion because the heat input exceeds the cooling capacity. Therefore, workpiece thermal distortion rises rather than improved surface finish, due to excessive material removal rates.
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