CRI CRI Acceptance Criteria & Discontinuity Evaluation

Question 1

According to AWS D1.1, what is the maximum allowable length of an individual porosity indication in a complete joint penetration groove weld?

Accepted Answer

3/8 inch (9.5 mm)

Answer

1/4 inch (6.4 mm)

Answer

1/2 inch (12.7 mm)

Answer

5/16 inch (7.9 mm)

Question 2

When evaluating linear indications per ASME Section V, what minimum length causes an indication to be classified as 'relevant'?

Accepted Answer

1/16 inch (1.6 mm)

Answer

1/8 inch (3.2 mm)

Answer

3/16 inch (4.8 mm)

Answer

1/4 inch (6.4 mm)

Question 3

Which discontinuity type is generally considered MOST detrimental to weld structural integrity under cyclic loading?

Accepted Answer

Cracks

Answer

Porosity

Answer

Slag inclusions

Answer

Undercut

Question 4

In radiographic interpretation, an elongated slag inclusion running parallel to the weld axis is best described as which type of discontinuity?

Accepted Answer

Wagon tracks

Answer

Wormhole porosity

Answer

Scattered porosity

Answer

Incomplete fusion

Question 5

Per API 1104, what action is required when a crack is found in a pipeline girth weld during radiographic examination?

Accepted Answer

The weld must be rejected regardless of crack length

Answer

Cracks up to 1 inch are acceptable

Answer

Cracks are acceptable if they do not exceed 10% of weld length

Answer

The weld may be repaired by grinding only

Question 6

When assessing incomplete penetration in a butt weld radiograph, what image characteristic distinguishes it from a crack?

Accepted Answer

Incomplete penetration appears as a straight dark line with smooth, defined edges at the weld centerline

Answer

Incomplete penetration has a jagged, branching appearance

Answer

Incomplete penetration always appears lighter than the base metal

Answer

Incomplete penetration is indistinguishable from a crack radiographically