AWS Welding Symbols & Blueprint Reading 2 — Questions and Answers
Question 1: On a welding symbol, what does a flag attached to the reference line indicate?
- Field weld (Correct answer)
- Inspect weld
- Preheat required
- Weld all around
Correct answer: Field weld
A flag (filled triangle) on the reference line denotes a field weld, meaning the weld is to be made at the installation site rather than in the shop.
Question 2: What does the letter 'F' following a weld size designation in a welding symbol specify?
- Finish method of the weld surface (Correct answer)
- Fillet weld type
- Flux-core process required
- Frequency of inspection
Correct answer: Finish method of the weld surface
The 'F' contour symbol indicates the method used to finish the weld surface (e.g., G=grind, M=machine, C=chip).
Question 3: In AWS welding symbol notation, where is the groove weld size placed relative to the weld symbol?
- To the left of the weld symbol (Correct answer)
- To the right of the weld symbol
- Above the reference line
- Inside the tail
Correct answer: To the left of the weld symbol
The groove weld size (depth of bevel or effective throat) is placed to the left of the weld symbol on the reference line.
Question 4: What does a circle at the intersection of the reference line and arrow indicate on a welding symbol?
- Weld all around (Correct answer)
- Field weld
- Inspection point
- Flush contour
Correct answer: Weld all around
A circle at the junction of the arrow and reference line means the weld is to be made completely around the joint.
Question 5: On a blueprint, a hidden line is represented by which line type?
- Dashed line (Correct answer)
- Solid continuous line
- Center line
- Phantom line
Correct answer: Dashed line
Hidden lines are drawn as evenly spaced dashes to indicate edges or surfaces not visible from the current viewing angle.
Question 6: What information is typically found in the title block of a welding blueprint?
- Drawing number, scale, material, and revision level (Correct answer)
- Weld process, electrode size, and preheat temperature
- Bill of materials and assembly sequence
- Inspection criteria and acceptance standards
Correct answer: Drawing number, scale, material, and revision level
The title block contains identifying information such as drawing number, part name, scale, material specification, drafter's name, and revision history.
Question 7: Which groove weld symbol resembles the letter 'V' on the welding symbol?
- V-groove (Correct answer)
- Bevel groove
- J-groove
- U-groove
Correct answer: V-groove
The V-groove weld symbol looks like an open 'V' and indicates both members are beveled to form a V-shaped groove.
AWS Welding Symbols & Blueprint Reading 2
On a welding symbol, what does a flag attached to the reference line indicate?