CSA Welded Steel Construction – Metal Arc Welding (W59) Welding Inspector Level 1 Practice Test

Fillet weld angles less than 60 degrees should be considered as which type of joint penetration?

Complete Joint Penetration Partial Joint Penetration No Penetration Mixed Penetration

Correct Answer:

Partial Joint Penetration

Explanation:

Penetration depth describes how far weld metal fuses into the joint thickness. A fillet weld sits at the corner of the two pieces and does not weld through the thickness like a groove weld designed for complete joint penetration. When the fillet angle is less than 60 degrees, the geometry of the weld reduces the effective fusion depth relative to the joint, so the weld does not achieve full-through fusion. That situation is classified as partial joint penetration. Complete joint penetration would require a groove weld intended to fuse through the full thickness, which a fillet weld does not provide. No penetration would imply no fusion at all, which isn’t the case here, and mixed penetration isn’t the standard classification for this scenario.

Access more questions from this quiz

Continue to CSA Welded Steel Construction – Metal Arc Welding (W59) Welding Inspector Level 1 Practice Test for more practice questions and the full quiz experience.

Access More Questions