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Correct 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.
Explanation by: Mr. Dubey
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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