Certified Welder Blueprint Reading and Symbols Questions and Answers

Question 1

On a standard welding blueprint, what does a symbol placed below the reference line signify?

Accepted Answer

The weld should be made on the 'arrow side' of the joint.

Answer

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?

Accepted Answer

The weld is to be made all around the joint.

Answer

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?

Accepted Answer

Object line

Answer

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?

Accepted Answer

It indicates the weld is to be made on-site (in the field) rather than in the fabrication shop.

Answer

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:

Accepted Answer

As part of the weld symbol on the reference line.

Answer

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.

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Certified Welder Blueprint Reading and Symbols Questions and Answers