WCL Inspection & Quality Control 4

Question 1

Which type of weld discontinuity is most detrimental to fatigue life?

Accepted Answer

Cracks

Answer

Cracks are the most detrimental weld discontinuity for fatigue life because their sharp tips act as severe stress concentrators that propagate rapidly under cyclic loading.

Question 2

When a welder's qualification test is failed, AWS D1.1 requires the welder to:

Accepted Answer

Retest immediately or after practice with the right to retest twice more

Answer

AWS D1.1 allows an immediate retest or retest after additional practice; if the second test also fails, additional practice and approval are required before a third attempt.

Question 3

What does 'discontinuity' mean in the context of weld inspection, as distinguished from a 'defect'?

Accepted Answer

A discontinuity is a deviation from ideal; a defect is a discontinuity that exceeds acceptance criteria

Answer

A discontinuity is any interruption in the typical structure of a weld, while a defect is a discontinuity that exceeds the acceptance criteria of the applicable code and is therefore rejectable.

Question 4

Liquid penetrant testing (PT) is limited to detecting:

Accepted Answer

Surface-breaking discontinuities only

Answer

Liquid penetrant testing can only detect discontinuities that are open to the surface because the penetrant must enter the defect by capillary action.

Question 5

What is the function of the 'Certified Welding Inspector' (CWI) designation issued by AWS?

Accepted Answer

Certifies the holder has the knowledge to inspect welds to code requirements

Answer

The AWS CWI credential certifies that the individual has demonstrated the knowledge and skills required to inspect welds in accordance with applicable codes and standards.

(WCL) Welding Certification Los Angeles Practice Test

(WCL) Welding Certification Los Angeles Practice Test

WCL Inspection & Quality Control 4