railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools Different Machining Processes
A grinding wheel of 150 mm diameter is rotating at 3000 rpm. The grinding speed is:
1
7.5 π m/s
2
15 π m/s
3
45 π m/s
4
None of these