AWS Blueprint Reading & Interpretation 2 — Questions and Answers
Question 1: On a welding symbol, what does a flag symbol on the reference line indicate?
- Field weld (Correct answer)
- All-around weld
- Melt-through required
- Backing required
Correct answer: Field weld
A flag symbol on the reference line indicates a field weld, meaning the weld is to be performed at the installation site rather than in the shop.
Question 2: What does the letter 'N' in a welding symbol tail typically stand for?
- Number of welds
- Non-destructive testing required (Correct answer)
- No filler metal
- Notch weld
Correct answer: Non-destructive testing required
The letter 'N' in the tail of a welding symbol indicates that non-destructive testing is required on that weld.
Question 3: In blueprint reading, what does a hidden line (dashed line) represent?
- A surface that is finished
- An edge or feature not visible from the current view (Correct answer)
- A centerline of a hole
- A cutting plane
Correct answer: An edge or feature not visible from the current view
Hidden lines, drawn as dashed lines, represent edges or features that exist behind or beneath the visible surface in that view.
Question 4: What is the purpose of a revision block on an engineering drawing?
- To list all materials used
- To record changes made to the drawing after initial release (Correct answer)
- To identify the drafter's name
- To show the scale of the drawing
Correct answer: To record changes made to the drawing after initial release
The revision block documents changes made to the drawing after it was originally issued, including revision number, description, date, and approval.
Question 5: On a welding symbol, dimensions placed to the LEFT of the weld symbol indicate:
- Weld length
- Weld size or depth of preparation (Correct answer)
- Pitch (center-to-center spacing)
- Number of weld passes
Correct answer: Weld size or depth of preparation
Dimensions to the left of the weld symbol indicate the size, depth of groove preparation, or throat size of the weld.
Question 6: What type of line is used to indicate a cutting plane on an engineering drawing?
- Thin solid line
- Thick dashed line
- Chain line with thick ends and arrows (Correct answer)
- Thin centerline
Correct answer: Chain line with thick ends and arrows
A cutting plane line is a chain line (alternating long and short dashes) that is thick at the ends with arrows indicating the direction of viewing.
Question 7: When a welding symbol shows dimensions as '3/8-2-6', what does the '6' represent?
- Weld size of 6 inches
- Pitch (center-to-center spacing) of 6 inches (Correct answer)
- 6 weld passes required
- 6 inch leg length
Correct answer: Pitch (center-to-center spacing) of 6 inches
In intermittent weld notation (size-length-pitch), the last number represents the pitch, or center-to-center spacing between welds.
AWS Blueprint Reading & Interpretation 2
On a welding symbol, what does a flag symbol on the reference line indicate?