A grinding wheel A 27 K 7 V is specified for finish grinding

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A grinding wheel A 27 K 7 V is specified for finish grinding of a HSS cutting tool. What do you understand about the wheel from the above code. Is this an appropriate choice?

1. yes
2. no, because abrasive is not correct
3. no, grain size is not correct
4. no, because grade is not correct choice

Correct Option: C

Grain size is given for rough cut. 27 ? rough cut