AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A welding drawing specifies a weld symbol with a square wave contour symbol. This symbol indicates that the weld face should have a specific contour. Which of the following best describes the required contour for the weld face?
- AA convex contour, where the weld face is curved outward.
- BA slightly raised contour, specific to certain processes.
- CA flush contour, where the weld face is flat with the base metal.
- DA concave contour, where the weld face is curved inward.
Show answer & explanationAnswer & explanation
Correct answer: D. A concave contour, where the weld face is curved inward.
The square wave contour symbol, which looks like a concave curve, indicates that the weld face should have a concave contour, meaning it curves inward.
Why the other options are wrong
- A. A convex contour is indicated by a convex contour symbol (a curve bowing outwards).
- B. While some processes might naturally produce a slightly raised contour, this is not what the concave contour symbol denotes.
- C. A flush contour is indicated by a straight line contour symbol.
Concave Contour Symbol
The concave contour symbol, resembling an inward curve, indicates that the weld face should be curved inward from the toes of the weld.
- Looks like an inverted arc.
- Located above or below the weld symbol.
- Specifies weld face shape.
Memory trick: Convex 'e' bulges out, Concave 'a' caves in, flush is just flat.