Tinning of two surfaces to be joined, applying flux and heating.
Heating of two surfaces to be joined, to high temperature in presence of flu x.
Heating of two su rfaces at low temperatures.
Joining of two surfaces without the use of flux.
DC-Electrode Positive
DC-Electrode Negative
AC
none of the above
To increase the welding current
To stabilize the arc
To prevent rusting
To control arc temperature
Alu minium
Copper
Iron
Bronze
1600-1700 degree celsius
2000-2100 degree celsius
2500 - 2600 degree celsius
3200 - 3300 degree celsius