AWS AWS Joint Design & Preparation 2

Question 1

What is the recommended minimum fillet weld size for a 3/4 in. base metal thickness per AWS D1.1?

Accepted Answer

3/16 in.

Answer

AWS D1.1 requires a minimum fillet weld size of 3/16 in. for base metal thickness between 1/2 in. and 3/4 in.

Question 2

Which weld joint configuration is most commonly used in structural steel construction for attaching a beam web to a column flange?

Accepted Answer

T-joint

Answer

A T-joint, welded with fillet welds, is the standard connection for attaching a beam web (or plate) to a column flange in structural steel work.

Question 3

'Effective throat' of a fillet weld is defined as:

Accepted Answer

The distance from the root to the face of the weld, perpendicular to the face

Answer

The effective throat is the shortest distance from the root to the weld face, and it is used to calculate fillet weld strength.

Question 4

What is the purpose of a 'backing bar' or 'backing strip' in groove welding?

Accepted Answer

To support the weld pool at the root and ensure complete root fusion

Answer

A backing bar supports the molten weld pool at the root pass, preventing burn-through and ensuring complete root fusion.

Question 5

What is the difference between a 'partial joint penetration (PJP)' and a 'complete joint penetration (CJP)' weld?

Accepted Answer

CJP achieves full depth fusion through the entire joint; PJP does not penetrate the full thickness

Answer

CJP welds penetrate fully through the joint thickness, while PJP welds are intentionally designed to fuse only a portion of the joint.

AWS Practice Test