railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) Fitter Machining Drilling and Reaming
Which is the possible cause when a twist drill produces a rough hole on the job?
1
The clearance angle is too small
2
The cutting speed is too low
3
The clearance angle is too big
4
Feed rate is too high