Certified Welder Blueprint Reading and Symbols Questions and Answers — Questions and Answers
Question 1: On a standard welding blueprint, what does a symbol placed below the reference line signify?
- The weld should be made on the 'arrow side' of the joint. (Correct answer)
- The weld should be made on the 'other side' of the joint.
- The weld requires a specific finishing process, such as grinding.
- The weld is to be performed in the field, not in the shop.
Correct answer: The weld should be made on the 'arrow side' of the joint.
According to AWS A2.4 standards, the placement of the weld symbol relative to the reference line is critical. A symbol below the reference line indicates the weld is to be placed on the side of the joint to which the arrow is pointing, known as the 'arrow side'.
Question 2: A welder is reviewing a blueprint and sees a circle at the junction of the arrow and the reference line on a welding symbol. What does this circle indicate?
- A plug or slot weld is required.
- The weld must be made in the shop.
- The weld is to be made all around the joint. (Correct answer)
- The weld requires 100% radiographic inspection.
Correct answer: The weld is to be made all around the joint.
The 'weld all around' symbol is an open circle placed at the intersection of the reference line and the arrow. It signifies that the weld should be continuous around the entire perimeter of the joint.
Question 3: Which of the following lines on a blueprint is used to show the visible outlines or edges of an object?
- Hidden line
- Object line (Correct answer)
- Center line
- Phantom line
Correct answer: Object line
Object lines, also called visible lines or full lines, are solid, dark lines used on a drawing to show the main outlines of the object being represented. Hidden lines represent edges that are not visible from the viewing angle, and center lines denote the center of symmetrical objects.
Question 4: While interpreting a welding symbol, a fabricator notes a flag located at the junction of the arrow and reference line. What is the significance of this flag?
- It indicates a special inspection is required after welding.
- It specifies the welding process to be used, such as SMAW or GMAW.
- It denotes that the weld is critical and must be performed by a senior welder.
- It indicates the weld is to be made on-site (in the field) rather than in the fabrication shop. (Correct answer)
Correct answer: It indicates the weld is to be made on-site (in the field) rather than in the fabrication shop.
The field weld symbol is a flag that appears at the junction of the reference line and arrow. Its presence signifies that the weld is not to be made in the shop but at the final erection site, known as the field.
Question 5: A blueprint calls for a V-groove weld. Information such as the required groove angle and root opening would be found:
- In the title block of the drawing.
- As part of the weld symbol on the reference line. (Correct answer)
- Only in the general notes section.
- On a separate bill of materials.
Correct answer: As part of the weld symbol on the reference line.
Specific dimensions for a groove weld, such as the groove angle and the root opening (the gap between the parts), are placed within and around the basic weld symbol on the reference line. For example, the root opening dimension is placed inside the V-groove symbol, and the angle is placed outside of it.
Question 6: A welding symbol includes the letters 'G' and 'M' above the contour symbol. What do these finishing symbols indicate?
- GMAW process with metal-cored wire.
- The weld should be gouged and then magnaflux tested.
- The weld must be ground and then machined. (Correct answer)
- General purpose weld, to be measured.
Correct answer: The weld must be ground and then machined.
Finish symbols indicate the method, not the process, used to achieve the final weld contour. The letter 'G' stands for Grinding, 'M' for Machining, 'C' for Chipping, and 'H' for Hammering. These letters are placed above the contour symbol to specify the required surface finish.
Certified Welder Blueprint Reading and Symbols Questions and Answers
On a standard welding blueprint, what does a symbol placed below the reference line signify?