Fillet weld classification: Is a fillet weld a form of resistance welding, or is “fillet” a weld shape commonly produced by arc processes?

Introduction / Context:
Welding terminology distinguishes between weld process (arc, gas, resistance) and weld type/shape (fillet, groove, plug). Misclassification can lead to wrong procedures or inspection criteria.

Given Data / Assumptions:

• Resistance welding includes spot, seam, and projection welding using electrical resistance heating and force.
• A fillet weld is a triangular cross-section joining two surfaces at roughly right angles.
• Fillet welds are typically made by arc processes (e.g., SMAW, GMAW, FCAW), though other processes can produce similar geometry.

Concept / Approach:
“Fillet” describes geometry, not the energy source. Resistance processes have their own specific names. Thus calling a fillet weld a type of resistance weld is incorrect terminology.

Step-by-Step Solution:

Verification / Alternative check:
Check a welding symbols chart: fillet is a basic symbol; separate process callouts (in tail or notes) specify arc or other methods.

Why Other Options Are Wrong:

Common Pitfalls:
Specifying a “resistance fillet” in documents; omitting process details when they affect quality and inspection.

Final Answer:
Incorrect