Certified Welder Weld Inspection and Testing 2

Question 1

Which discontinuity type is characterized by a void running along the length of a weld, parallel to the weld axis?

Accepted Answer

Longitudinal crack

Answer

A longitudinal crack runs parallel to the weld axis and is one of the most serious weld discontinuities.

Question 2

What does a high-frequency ultrasonic testing (UT) transducer measure to detect internal flaws?

Accepted Answer

Sound wave reflections

Answer

UT transducers emit high-frequency sound waves and detect reflected signals (echoes) from internal discontinuities.

Question 3

During visual inspection, what condition describes weld metal that extends beyond the toe of the weld onto the base metal without fusing?

Accepted Answer

Cold lap

Answer

Cold lap (also called overlap) occurs when molten weld metal flows onto the base metal surface without fusing due to insufficient heat.

Question 4

Which destructive test is used to determine the maximum load a weld can withstand before fracturing?

Accepted Answer

Tensile test

Answer

The tensile test measures a weld's ultimate tensile strength by pulling a specimen until it fractures.

Question 5

What is the primary purpose of a nick-break test?

Accepted Answer

Reveal internal porosity and fusion defects

Answer

The nick-break test fractures a weld specimen to expose the cross-section, revealing porosity, slag inclusions, and incomplete fusion.

Certified Welder Practice Test