CWI Joint Design and Weld Joint Types 3

Question 1

What does the abbreviation 'CJP' mean in welding and inspection terminology?

Accepted Answer

Complete Joint Penetration

Answer

Controlled Joint Preparation

Answer

Combined Joint Profile

Answer

Certified Joint Procedure

Question 2

A partial joint penetration (PJP) groove weld differs from a complete joint penetration (CJP) groove weld primarily because:

Accepted Answer

PJP welds do not extend through the full thickness of the joint

Answer

PJP welds always produce higher tensile strength than CJP welds

Answer

PJP welds require a backing bar for all welding positions

Answer

PJP welds can only be made using the SMAW process

Question 3

The effective throat of a PJP groove weld is used primarily for:

Accepted Answer

Calculating the allowable load-carrying capacity of the weld

Answer

Measuring the total depth of the groove preparation

Answer

Determining the required root opening size

Answer

Specifying the welding electrode classification

Question 4

When using a prequalified joint from AWS D1.1, what must the welding engineer confirm before using it in production?

Accepted Answer

All joint details match the prequalified requirements including groove angle, root opening, and root face

Answer

The joint has been previously tested at the exact base metal thickness to be welded

Answer

A separate Procedure Qualification Record must be filed with AWS headquarters

Answer

An AWS CWI must witness and sign off on the first production weld made with that joint

Question 5

During pre-weld inspection of a groove weld joint preparation, which dimensional characteristics should the CWI verify?

Accepted Answer

Groove angle, root opening, and root face dimensions

Answer

Final weld size, contour, and surface finish

Answer

Post-weld heat treatment temperatures and soak times

Answer

Mechanical test coupon dimensions and orientation

Question 6

What is the primary function of a backing bar (steel backing) placed at the root of a groove weld joint?

Accepted Answer

To support the molten weld pool at the root and ensure complete fusion on the back side

Answer

To preheat the base metal to the required interpass temperature

Answer

To reduce the included groove angle needed for the joint

Answer

To prevent distortion of the base metal during cooling

Question 7

For a single-V groove joint with a root opening of 1/4 inch (6 mm), what root face (land) dimension is typically specified in AWS D1.1 prequalified joints?

Accepted Answer

0 inch — feather edge

Answer

1/16 inch (1.5 mm)

Answer

1/8 inch (3 mm)

Answer

3/16 inch (5 mm)