AWS Certified Welding Inspector — FundamentalsWelding SymbolsHard
A CWI is examining a blueprint for a pipe joint. The welding symbol indicates a single-V groove weld. Below the reference line, the groove weld symbol is shown with a dimension '30°' at the top opening. Below this, there is a '3' and then '5'. What does the '5' below the '3' signify for this groove weld?
- AThe groove angle.
- BThe root face.
- CThe depth of bevel.
- DThe root opening.
Show answer & explanationAnswer & explanation
Correct answer: B. The root face.
For a single-V groove weld, the root opening is typically placed first, followed by the root face, then the groove angle. So, '3' would likely be the root opening, and '5' would be the root face. The '30°' is the groove angle.
Why the other options are wrong
- A. The groove angle ('30°') is explicitly marked at the top opening of the groove symbol.
- C. The depth of bevel is inferred from other dimensions, not directly given as '5' in this context.
- D. The root opening ('3') is typically placed before the root face.
Groove Weld Root Face Dimension
For groove welds, the root face dimension is typically shown below the root opening dimension or as the second dimension in a sequence of root dimensions.
- Part of groove weld preparation.
- Indicated below root opening.
- Ensures proper root fusion.
Memory trick: ROOF: Root Opening, then Root Face, then Groove Angle.