Blueprint Reading and Symbols Flashcards
6 cards from real Certified Welder practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Blueprint Reading and Symbols flashcards as text
On a standard welding blueprint, what does a symbol placed below the reference line signify?
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'.
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?
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.
Which of the following lines on a blueprint is used to show the visible outlines or edges of an object?
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.
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?
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.
A blueprint calls for a V-groove weld. Information such as the required groove angle and root opening would be found:
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.
A welding symbol includes the letters 'G' and 'M' above the contour symbol. What do these finishing symbols indicate?
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.