AWS Joint Design & Preparation 5

Question 1

Which AWS joint type is formed when two members are joined at an angle other than 90°?

Accepted Answer

Oblique joint

Answer

An oblique joint is formed when two members meet at an angle other than a right angle, requiring special consideration in groove design.

Question 2

What is the recommended maximum root face dimension for a SMAW groove weld to ensure complete root fusion?

Accepted Answer

1/8 inch

Answer

AWS recommends a root face of approximately 1/8 inch (3 mm) for SMAW to ensure the electrode arc can fuse through to the back of the joint.

Question 3

When preparing a J-groove joint, what is the main advantage over a V-groove joint for thick plate?

Accepted Answer

J-groove requires less weld metal due to its curved groove face profile

Answer

The curved radius at the bottom of a J-groove reduces the cross-sectional area of the weld groove, requiring significantly less filler metal than a V-groove in thick plate.

Question 4

In AWS D1.1 Structural Welding Code, what is the minimum preheat temperature required before making joint preparations on hardenable alloy steels?

Accepted Answer

It depends on the carbon equivalent and material thickness

Answer

AWS D1.1 preheat requirements for hardenable steels depend on carbon equivalent (CE) and material thickness, not a single fixed temperature.

Question 5

What is the purpose of a 'runoff tab' used during joint preparation and welding of butt joints?

Accepted Answer

To extend the weld beyond the base metal ends to ensure full-size weld at the joint ends

Answer

Runoff tabs are temporary extensions welded at the ends of a joint so the weld can start and terminate at full cross-section, avoiding craters and incomplete fusion at the edges.

AWS Practice Test

AWS Practice Test

AWS Joint Design & Preparation 5