WCL Inspection & Quality Control 2

Question 1

Which non-destructive testing method uses high-frequency sound waves to detect internal weld defects?

Accepted Answer

Ultrasonic testing

Answer

Ultrasonic testing (UT) transmits high-frequency sound waves through the weld to detect internal discontinuities by analyzing reflected signals.

Question 2

What is the primary purpose of a weld procedure specification (WPS)?

Accepted Answer

To provide direction for making production welds

Answer

A WPS provides written instructions that direct welders in making production welds to the required quality and to meet the applicable code.

Question 3

A porosity defect in a weld is caused by:

Accepted Answer

Gas trapped during solidification

Answer

Porosity occurs when gas becomes entrapped within the weld metal as it solidifies, forming voids or pores.

Question 4

According to AWS D1.1, incomplete fusion is classified as a:

Accepted Answer

Rejectable weld discontinuity

Answer

Incomplete fusion is a rejectable discontinuity under AWS D1.1 because it represents a lack of bond between the weld metal and the base metal or between weld passes.

Question 5

When performing radiographic testing, what does a darker area on the film typically indicate?

Accepted Answer

A void or less dense area such as porosity

Answer

Darker areas on radiographic film indicate regions where more radiation passed through, which typically corresponds to voids, cracks, or porosity with lower density than sound metal.

(WCL) Welding Certification Los Angeles Practice Test

(WCL) Welding Certification Los Angeles Practice Test

WCL Inspection & Quality Control 2