Which statement best describes a fillet weld and its typical applications?

Which statement best describes a fillet weld and its typical applications?

• A. Triangular weld joining two surfaces at a right angle; commonly used on T-, lap-, and corner joints.
• B. A groove weld formed between two joint faces for full penetration.
• C. A spot weld used for attaching thin sheet metal.
• D. A butt weld with square edges used on all joint types.

Answer: (C)

A fillet weld is a weld that fills the triangular area between two surfaces that meet at a right angle, producing a strong junction with a rounded cross-section. This makes it ideal for joining parts at T-, lap-, and corner joints where the pieces don’t lie in the same plane. The other options describe different weld types: a groove weld is made along a joint face for full penetration, a spot weld is a small resistance weld used for attaching thin sheet metal, and a butt weld with square edges joins pieces end-to-end or in a flush butt joint.

A fillet weld is a weld that fills the triangular area between two surfaces that meet at a right angle, producing a strong junction with a rounded cross-section. This makes it ideal for joining parts at T-, lap-, and corner joints where the pieces don’t lie in the same plane. The other options describe different weld types: a groove weld is made along a joint face for full penetration, a spot weld is a small resistance weld used for attaching thin sheet metal, and a butt weld with square edges joins pieces end-to-end or in a flush butt joint.