AWS Welder Testing & Quality Assurance 2

Question 1

A welder fails a bend test because the coupon cracks at the root. What is the most likely cause?

Accepted Answer

Incomplete fusion at the root

Answer

Root cracks on bend tests typically indicate incomplete fusion or penetration at the root of the weld joint.

Question 2

Which AWS standard governs welder qualification for structural steel welding?

Accepted Answer

AWS D1.1

Answer

AWS D1.1 Structural Welding Code — Steel is the primary standard for qualifying welders on structural steel applications.

Question 3

What is the maximum number of guided bend test specimens that may show discontinuities exceeding 1/8 inch before the test is considered a failure?

Accepted Answer

None — any such discontinuity is a failure

Answer

Under AWS D1.1, any single discontinuity exceeding 1/8 inch in any direction on the convex surface constitutes a failed bend test.

Question 4

A radiographic test reveals elongated slag inclusions aligned parallel to the weld axis. What welding variable most likely caused this?

Accepted Answer

Insufficient interpass cleaning

Answer

Parallel slag inclusions typically result from slag trapped between passes due to inadequate interpass cleaning with a chipping hammer and wire brush.

Question 5

When performing a fillet weld break test, the weld is fractured to expose the cross-section. What defect would cause immediate failure?

Accepted Answer

Incomplete fusion extending more than 20% of weld length

Answer

Incomplete fusion beyond the allowable limit means the weld failed to bond properly to the base metal, which is a critical structural defect.

AWS Practice Test

AWS Practice Test

AWS Welder Testing & Quality Assurance 2