railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Joining Welding
Which of the following functions is/are provided by the covered or coated electrode used in shielded metal arc welding?
1
Adds scavengers and de-oxidizers to the weld metal
2
All of the options
3
Provides a slag blanket to protect the hot weld metal
4
Provides gas shielding for the arc