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| Q. |
For what value of machining depths, surface roughness sharply increases with depth of cut? |
| A. | <100 µm |
| B. | <200 µm |
| C. | <300 µm |
| D. | <400 µm |
| Answer» B. <200 µm | |
| Explanation: for material depths <200 µm, surface roughness increases with depth of cut. | |
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