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| Q. |
What is the maximum permissible error in wear of centres? |
| A. | 0.04 mm |
| B. | 0.03 mm |
| C. | 0.02 mm |
| D. | 0.01 mm |
| Answer» D. 0.01 mm | |
| Explanation: the centres are set and checked for straightness. it can be observed while rotating the centres. the maximum error permissible for wear of centres is 0.01 mm. | |
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