General Studies · Manufacturing Processes
In the standard marking system of a grinding wheel (e.g., 51-A 46 H 5 V 8), what does the alphabetical symbol 'H' represent?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Type of abrasive material used in the wheel
- 2Grain size of the abrasive particles
- 3Type of bond used to hold the abrasive
- 4Grade of hardness of the grinding wheel✓
Correct answer
Grade of hardness of the grinding wheel
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