Ultimate Review Flashcards

According to AWS D1.1, what is the minimum preheat temperature required for ASTM A514 steel (thickness > 2.5 in) when welding with SMAW?

Answer: 225°F (107°C)

AWS D1.1 Table 4.5 requires a minimum preheat of 225°F (107°C) for A514 steel over 2.5 inches thick.

Which discontinuity is characterized by a groove melted into the base metal adjacent to the weld toe and left unfilled?

Answer: Undercut

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

A welder qualification test plate is welded in the 2G position. Which position(s) does this qualify the welder to weld in production?

Answer: Flat and horizontal

A 2G groove weld qualification qualifies the welder for flat (1G) and horizontal (2G) positions only.

What does the term 'effective throat' refer to in a fillet weld?

Answer: The shortest distance from the root to the face of a fillet weld, excluding convexity

The effective throat is the shortest distance from the joint root to the weld face, excluding any weld convexity.

When inspecting a radiograph, a rounded indication with a length-to-width ratio of 3:1 or less is classified as:

Answer: A porosity indication

Rounded indications on radiographs have a length-to-width ratio of 3:1 or less and typically represent porosity or similar volumetric discontinuities.

In magnetic particle testing (MT), which type of magnetization is most effective for detecting longitudinal (axial) discontinuities in a pipe?

Answer: Circular magnetization

Circular magnetization produces flux lines that encircle the part, making it most effective for detecting longitudinal discontinuities.

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

Answer: To reveal weld profile, fusion, and internal discontinuities

A macro-etch test uses acid etching of a cross-sectioned specimen to visually reveal weld profile, fusion zone, heat-affected zone, and internal discontinuities.