Inspection & Quality Control Flashcards

Which destructive test is used to evaluate the ductility of a weld by bending the specimen until it fractures?

Answer: Guided bend test

The guided bend test bends the weld specimen to a specified radius to evaluate ductility and reveal surface or subsurface defects.

What type of weld discontinuity is characterized by the weld metal not fusing completely with the base metal or previous weld pass?

Answer: Incomplete fusion

Incomplete fusion (lack of fusion) occurs when the weld metal fails to bond properly with the base metal or adjacent weld passes.

When performing visual inspection of a completed weld, which measurement tool is used to verify fillet weld leg size and throat?

Answer: Fillet weld gauge

A fillet weld gauge is specifically designed to measure the leg size, throat, and convexity or concavity of fillet welds.

What is the AWS definition of a 'discontinuity' in a weld?

Answer: An interruption in the typical structure of a weld

AWS defines a discontinuity as an interruption of the typical structure of a material, including lack of homogeneity in mechanical, metallurgical, or physical characteristics.

In radiographic testing of welds, what does image quality indicator (IQI) verify?

Answer: The sensitivity and quality of the radiographic image

An IQI (penetrameter) is placed on the weld to verify that the radiograph has sufficient sensitivity to detect discontinuities of a specified size.

Which type of crack forms in the heat-affected zone parallel to the weld axis and is associated with hydrogen embrittlement?

Answer: Underbead crack

Underbead cracks form in the HAZ beneath the weld bead and are primarily caused by hydrogen-induced cracking in susceptible base metals.

What visual weld defect occurs when the weld metal rolls over the base metal surface without fusing to it?

Answer: Overlap

Overlap is a weld discontinuity where the weld metal extends beyond the weld toe and lies on the base metal surface without fusing to it.