AWS AWS Joint Design & Weld Symbols 5

Question 1

What is the purpose of a 'backing' symbol (rectangle) shown on a welding symbol?

Accepted Answer

Specifies a backing bar or strip is to be used on the root side

Answer

The backing symbol (rectangle) on the opposite side of the arrow specifies that a backing material shall be placed at the root of the joint.

Question 2

Which of the following correctly describes an edge joint?

Accepted Answer

Two members whose surfaces are parallel and an edge of each is joined

Answer

An edge joint joins the edges of two or more parallel or nearly parallel members.

Question 3

On a groove weld symbol, what does the number shown in parentheses indicate?

Accepted Answer

Effective throat size

Answer

A number in parentheses on a groove weld symbol indicates the effective throat (penetration depth) required.

Question 4

A plug weld symbol differs from a slot weld symbol primarily because:

Accepted Answer

Plug welds are circular holes; slot welds are elongated holes

Answer

Plug welds fill circular holes, while slot welds fill elongated (oblong) holes in the overlapping member.

Question 5

What is the root opening in a joint design?

Accepted Answer

The separation between the groove faces at the root of the joint

Answer

The root opening is the separation between the members to be joined at the root of the joint, allowing for complete penetration.

AWS Practice Test