AWS Welding Inspection, Testing & Quality Control 2

Question 1

What does the term 'undercut' refer to in weld inspection?

Accepted Answer

A groove melted into the base metal adjacent to the weld toe

Answer

Undercut is a groove or channel melted into the base metal at the weld toe that remains unfilled by weld metal.

Question 2

Which destructive test is specifically used to measure a weld's resistance to sudden impact loading?

Accepted Answer

Charpy V-notch test

Answer

The Charpy V-notch test measures the energy absorbed by a notched specimen when struck by a swinging pendulum, indicating toughness.

Question 3

In radiographic testing (RT), what appears darker on the film when compared to sound base metal?

Accepted Answer

Porosity and voids

Answer

Voids and porosity allow more radiation to pass through, causing those areas to appear darker on radiographic film.

Question 4

What is the purpose of a macro-etch test on a weld cross-section?

Accepted Answer

To reveal the weld's internal structure, fusion zone, and HAZ

Answer

A macro-etch test uses acid to reveal the weld's cross-sectional structure, including the fusion zone, heat-affected zone, and any gross discontinuities.

Question 5

Which type of weld discontinuity is best detected by ultrasonic testing but may be missed by radiography?

Accepted Answer

Planar defects such as cracks and lack of fusion

Answer

Ultrasonic testing is highly sensitive to planar defects like cracks and lack of fusion because they reflect sound waves effectively, while radiography may miss them if oriented parallel to the beam.

AWS Practice Test

AWS Practice Test

AWS Welding Inspection, Testing & Quality Control 2