Certified Welder Weld Inspection and Defects 2

Question 1

Which destructive test is used to evaluate the ductility and soundness of a weld by bending the specimen around a mandrel?

Accepted Answer

Guided bend test

Answer

Charpy impact test

Answer

Hardness test

Answer

Tensile test

Question 2

Lamellar tearing in a weld joint is most commonly caused by:

Accepted Answer

High sulfur content in base metal and through-thickness loading

Answer

Excessive heat input

Answer

Hydrogen embrittlement in the weld metal

Answer

Improper shielding gas mixture

Question 3

What does the term 'lack of sidewall fusion' specifically describe?

Accepted Answer

Incomplete fusion between the weld metal and the groove face of the base metal

Answer

Incomplete fusion between the root pass and the base metal

Answer

A gap at the root of the joint left unfilled

Answer

Porosity located along the weld centerline

Question 4

During radiographic testing, a linear indication parallel to the weld axis most likely represents:

Accepted Answer

Longitudinal crack or lack of fusion

Answer

Transverse crack

Answer

Tungsten inclusion

Answer

Isolated pore

Question 5

Which weld discontinuity is most likely detected by magnetic particle testing but NOT by liquid penetrant testing?

Accepted Answer

Subsurface crack just below the surface

Answer

Surface porosity open to the outside

Answer

Surface hot crack

Answer

Undercut at the weld toe

Question 6

A welder notices fisheye fractures on the face of a broken tensile specimen. This indicates the presence of:

Accepted Answer

Hydrogen-induced porosity or inclusions

Answer

Sulfur segregation

Answer

Excessive carbon content in filler metal

Answer

Cold lap on the surface

Question 7

What standard acceptance criterion terminology indicates a discontinuity that does NOT meet code requirements and must be repaired or removed?

Accepted Answer

Rejectable defect

Answer

Indication

Answer

Relevant indication

Answer

Non-relevant indication