• # question_answer Turning operation, the feed could be doubled to increase the metal removal rate. To keep the same level of surface finish, the nose radius of the tool should be: A) Halved             B) Kept unchangedC) Doubled            D) made four times

Correct Answer: D

Solution :

Surface finish ${{({{R}_{a}})}_{\max }}\frac{{{f}^{2}}}{8r}$ $\frac{{{r}^{2}}}{{{r}^{1}}}={{\left( \frac{{{f}_{2}}}{{{f}_{1}}} \right)}^{2}}={{2}^{2}}=4$

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