How to prepare for the QBQ practical welding exam?

The QBQ practical exam is demanding. Here are tips to maximize your chances of success:

Technical preparation:

• Practise in the positions and on the thicknesses the body or employer assesses: those are what the test uses
• Master E7018 electrodes: short arc technique, straight bead, clean strike
• Train on plates prepared like the test plates (thickness and bevel), with the joint preparation the WPS specifies
• Learn to read your weld pool — it's more reliable than counting amps

Exam day:

• Arrive with your own equipment: helmet, gloves, jacket, grinder, safety glasses
• Inspect the plates before starting: alignment, root gap (the one the joint preparation specifies), cleanliness
• Make quality tacks — a plate that moves during the root pass = likely failure
• Clean every pass with a hammer and wire brush (slag = porosity on the next pass)

Most frequent grounds for rejection:

• lack of fusion at the root (unpenetrated root)
• undercut
• excessive or aligned porosity
• crack in the weld or HAZ

The thresholds applied to each defect are those of the body running the test or of the project code: the platform does not publish them.