AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A technician is fabricating a component for a high-pressure system. The blueprint specifies a single-V groove weld with a root opening of 3/32 inches and a groove angle of 60 degrees. The welding symbol shows '60°' inside the V-groove symbol and '3/32' below it. Which dimension is represented by the '3/32' value?
- AThe depth of the weld.
- BThe leg size.
- CThe effective throat.
- DThe root opening.
Show answer & explanationAnswer & explanation
Correct answer: D. The root opening.
For groove welds, the root opening is indicated directly below the groove weld symbol. The groove angle is shown inside the groove symbol, and other dimensions like depth or effective throat have different placements or derived values.
Why the other options are wrong
- A. Depth of weld is not typically shown directly below the symbol for groove welds.
- B. Leg size is specific to fillet welds, not groove welds.
- C. Effective throat for groove welds is often assumed as joint thickness or specified in the tail.
Groove Weld Root Opening
The root opening for a groove weld is the separation between the members at the root of the joint, indicated by a dimension placed below the groove weld symbol.
- Located directly below the groove weld symbol.
- Specifies the gap at the root of the joint.
- Crucial for proper weld penetration.
Memory trick: Root opening below, angle inside, like a blueprint's hidden show.