NDT Weld Inspection & Evaluation

Question 1

Which weld discontinuity is characterized by an unfused area between the weld metal and base metal along the weld toe?

Accepted Answer

Lack of fusion

Answer

Porosity

Answer

Undercut

Answer

Overlap

Question 2

According to AWS D1.1, which visual weld inspection criterion applies to undercut in a statically loaded structure?

Accepted Answer

Undercut shall not exceed 1/16 inch in depth

Answer

Undercut shall not exceed 1/32 inch in depth

Answer

Undercut is acceptable up to 1/8 inch in depth

Answer

Undercut must be completely absent

Question 3

What is the primary purpose of a weld profile gauge during visual inspection?

Accepted Answer

Verifying weld bead geometry and throat dimensions

Answer

Measuring weld preheat temperature

Answer

Detecting subsurface porosity

Answer

Checking base metal hardness

Question 4

Which type of weld crack propagates parallel to the weld axis along the centerline of the weld bead?

Accepted Answer

Longitudinal crack

Answer

Transverse crack

Answer

Underbead crack

Answer

Toe crack

Question 5

In a butt weld inspection, what does the term 'reinforcement' refer to?

Accepted Answer

Weld metal extending above the base metal surface

Answer

Backing bar used during welding

Answer

Filler material added to strengthen the joint

Answer

Post-weld heat treatment process

Question 6

What type of discontinuity appears as a group of small, rounded indications scattered throughout the weld metal?

Accepted Answer

Distributed porosity

Answer

Slag inclusions

Answer

Linear cracks

Answer

Lack of penetration

Question 7

When performing visual inspection of a completed weld, which condition requires the inspector to reject the weld regardless of the applicable code?

Accepted Answer

Visible cracks of any length

Answer

Acceptable weld reinforcement height

Answer

Slight surface ripple in the weld bead

Answer

Minor spatter within 1 inch of the weld