AWS Joint Design & Preparation 4

Question 1

What is the primary purpose of a backing bar in a groove weld joint?

Accepted Answer

To support the weld pool and ensure complete root penetration

Answer

A backing bar supports the molten weld pool on the back side of a joint, ensuring complete penetration without burn-through.

Question 2

When designing a double-V groove joint, what is the main advantage over a single-V groove joint?

Accepted Answer

It reduces total weld metal volume and distortion

Answer

A double-V groove joint reduces the total amount of weld metal required and minimizes angular distortion by distributing the weld on both sides.

Question 3

According to AWS standards, what does the term 'groove angle' refer to in joint design?

Accepted Answer

The total included angle of the groove between the two joint members

Answer

The groove angle is the total included angle formed between the two groove faces of the joint members.

Question 4

Which joint preparation method is most appropriate for a T-joint requiring a full-penetration weld in heavy plate?

Accepted Answer

Single or double bevel groove preparation

Answer

A single or double bevel groove on the vertical member of a T-joint allows access for full penetration weld metal deposition in heavy plate.

Question 5

What is a 'land' (root face) in a groove weld joint preparation?

Accepted Answer

The flat portion at the bottom of a bevel or groove face

Answer

The land, or root face, is the flat portion at the root edge of a prepared joint member, used to control burn-through.

AWS Practice Test