railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools
For producing more accurate holes, the sequence of operations to be followed is:
1
Centering, drilling, boring, reaming
2
Centering, boring, drilling, reaming
3
Drilling, centering, boring, reaming
4
Drilling, reaming, boring, centering