railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Joining Welding
Which of the following operations is known as ‘sweating’?
1
Tinning two surfaces to be joined, applying flux and heating
2
Heating two surfaces to be joined, to the high temperature in presence of flux
3
Heating two surfaces at low temperature
4
Joining of two surfaces without use of flux