Question

What should a welder never do while feeding the wire through the liner and contact tip?

1) Use excessive force
2) Use a worn-out liner
3) Use a damaged contact tip
4) All of the above

Answer 1

A welder should never use excessive force, a worn-out liner, or a damaged contact tip while feeding the wire through the liner and contact tip. These actions can lead to various welding problems and defects.

Step-by-step explanation:

When feeding the wire through the liner and contact tip, a welder should never do four things: 1) use excessive force, 2) use a worn-out liner, 3) use a damaged contact tip. These actions can lead to various problems and issues, such as poor wire feeding, erratic arc, and welding defects.

For example, using excessive force can cause the wire to jam or get stuck in the liner, leading to wire burnback or birdnesting. Furthermore, a worn-out liner or a damaged contact tip can negatively affect the electrical conductivity and transfer of current, leading to an unstable arc and poor weld quality.