Welder interview questions and how to answer them

Most welder interviews end in the booth, not the office. What you say at the table gets you to the weld test, and the weld test gets you the job. This guide covers both halves so you walk in knowing what the foreman is listening for.

12 questions7 minute read

Part 1

1.Which welding processes are you comfortable with, and which one do you run best?

Why they ask

Every shop leans on one or two processes. The foreman wants to know if you can go straight onto their work or if you'll need weeks of practice first.

How to answer

  • Name the processes plainly: stick, MIG, flux core, TIG
  • Say which one you've run the most hours on and on what kind of work
  • Be honest about the weak one and what you've done to improve it
  • Tie your best process to what this shop builds

2.Walk me through reading this weld symbol.

Why they ask

If you can't read the print, you'll weld the wrong side, the wrong size or the wrong length, and somebody has to grind it out.

How to answer

  • Point out the arrow side versus the other side
  • Read the weld type, the leg size and the length and pitch if it's stitched
  • Call out the field weld flag or the all-around circle if they're there
  • Mention any finish or contour symbol and what it means for grinding

3.What positions are you certified in, and when did you last test?

Why they ask

Certifications lapse if you don't keep welding in that process. They need to know whether your paper is current and whether it matches their work.

How to answer

  • List your certs by process, position and material, like vertical and overhead on carbon steel plate
  • Say who tested you, a school, a previous employer or an accredited test facility
  • Explain whether you've stayed in continuity since
  • Say you're happy to test again on their procedure
4.You're running a fillet weld and the bead looks cold and ropey. What do you check?

Why they ask

This tests whether you understand your machine or just turn knobs until it looks better.

How to answer

  • Check voltage and wire feed speed against the thickness you're on
  • Look at travel speed and gun angle
  • Check stickout and whether the ground is clean and close
  • Run a test bead on scrap before going back to the part
5.How do you control distortion on a long weld or a thin part?

Why they ask

Warped parts get scrapped or straightened with heat, and both cost the shop time. Good welders plan for it before they strike an arc.

How to answer

  • Tack properly and in a sequence, not just at the ends
  • Use backstepping or skip welding to spread the heat
  • Clamp or brace the part, and preset it when you know which way it'll pull
  • Keep the weld size to what the print calls for, since oversize welds pull harder

Part 2

6.What's your prep routine before you weld on a new part?

Why they ask

A lot of rejected welds start with dirty metal, bad fit-up or the wrong filler, not bad hands.

How to answer

  • Read the print and the weld procedure first
  • Clean off mill scale, rust, oil and paint with a grinder or flap disc
  • Check fit-up, gap and bevel, and fix it before welding over it
  • Confirm filler, gas and any preheat the procedure calls for
7.Your weld failed the bend test or got flagged by the inspector. What do you do next?

Why they ask

Everyone lays a bad weld eventually. The foreman wants to see whether you own it and fix the cause.

How to answer

  • Look at where it broke, like lack of fusion at the root or porosity
  • Figure out the likely cause, whether that's heat, angle, contamination or gas coverage
  • Tell the lead straight away rather than hiding it
  • Grind it out, correct the setup and reweld it to the procedure
8.How do you handle safety in the booth and on the floor?

Why they ask

Burns, arc flash, fumes and fires are real. One careless welder can hurt the person in the next bay.

How to answer

  • Name your PPE: hood, safety glasses under it, FR clothing, leathers and gloves
  • Talk about ventilation or fume extraction, especially on galvanized or stainless
  • Mention fire watch and hot work permits when you're near anything that burns
  • Say you check leads, grounds and gas cylinders before you start
9.Tell me about a time you had to weld in a tough position or a tight spot.

Why they ask

Real work isn't always flat on a table. They want proof you can adjust your body and your technique.

How to answer

  • Describe the job, like an overhead joint on a beam or a pipe close to a wall
  • Say how you set up to stay steady, bracing an arm or dry-running the motion
  • Explain any settings you changed for the position
  • Give the outcome, whether it passed inspection or held up
10.What would you do if the print and the part in front of you don't match?

Why they ask

Guessing on a production part can scrap a whole run. They want someone who stops and asks.

How to answer

  • Stop before welding anything you're unsure about
  • Check the print revision and measure the part again
  • Take it to your lead or the engineer with the specific mismatch
  • Write down what was decided so the next shift knows

Part 3

11.How do you work with fitters, inspectors and the next shift?

Why they ask

Welders rarely work alone. Friction with the fitter or the inspector slows the whole line.

How to answer

  • Give a real example of flagging a fit-up problem to a fitter without drama
  • Talk about taking an inspector's call-out as information, not an insult
  • Mention leaving your station clean and noting where you stopped
  • Show you'll help load, move or grind when your welds are caught up
12.Why do you want to weld here?

Why they ask

Turnover in shops is expensive. The foreman wants a reason to think you'll stay past the first month.

How to answer

  • Say something specific about their work, like structural, pipe, trailers or custom fab
  • Connect it to the process or skill you want to get better at
  • Mention the shift or location fits your life, if that's true
  • Keep it short and plain

Questions to ask them

Ask at least two. It shows you're picking them too.

  • What process and position will the weld test be in, and what code or procedure do you test to?
  • What does most of the work look like day to day, production runs or one-off jobs?
  • Do you supply consumables and hoods, or do welders bring their own gear?
  • How do new welders get trained on your procedures before they go on production parts?
  • Is there a path to test into other processes or into a lead or inspector role here?