AWS Welding Inspection & Testing 4

Question 1

During a magnetic particle inspection (MPI) of a fillet weld, indications appear only when the magnetic field is perpendicular to a discontinuity. What is the recommended practice to ensure complete coverage?

Accepted Answer

Magnetize in two directions at least 45° apart

Answer

Magnetizing in two directions at least 45° apart (typically 90°) ensures that discontinuities oriented in any direction will be detected.

Question 2

A radiographic image shows a dark, elongated linear indication with fuzzy edges inside the weld. This is most likely indicative of:

Accepted Answer

Slag inclusion

Answer

Slag inclusions appear as dark, elongated linear indications with irregular or fuzzy edges in radiographic images.

Question 3

When performing a guided bend test, the coupon cracks at the weld toe on the tension side. This result indicates:

Accepted Answer

Lack of fusion at the weld toe

Answer

Cracking at the weld toe during a guided bend test indicates lack of fusion between the weld metal and base metal at that location.

Question 4

AWS D1.1 requires that the inspector verify the preheat temperature at what minimum distance from the joint edge before welding begins?

Accepted Answer

3 inches (75 mm)

Answer

AWS D1.1 requires preheat to be verified at a minimum distance of 3 inches (75 mm) from the point of welding on each side of the joint.

Question 5

A liquid penetrant inspection is performed on a stainless steel weld. After removing the excess penetrant, the developer is applied. What does the absence of any indications confirm?

Accepted Answer

No surface-breaking discontinuities are present

Answer

Liquid penetrant testing is a surface NDT method and only confirms the absence of surface-breaking discontinuities; it cannot detect subsurface defects.

AWS Practice Test

AWS Practice Test

AWS Welding Inspection & Testing 4