railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools
Which of the following is true for grinding wheel?
1
Grade of grinding wheel is related to its hardness
2
Soft grinding wheel is used to grind the soft steel
3
Hard grinding wheel is used to grind hard steel
4
‘A’ denotes the hardest abrasive wheel