FREE CWI Destructive Testing Procedures Questions and Answers

Question 1

Which destructive test is primarily used to evaluate the resistance of a weld to sudden impact loads and is often specified for applications in low-temperature environments?

Accepted Answer

Charpy V-notch impact test

Answer

Bend test

Answer

Tensile test

Answer

Macroetch test

Question 2

A CWI is reviewing the results of a bend test performed on a butt weld. The test specimen fractured during bending, revealing significant lack of fusion at the root. What does this result primarily indicate about the weld?

Accepted Answer

The weld exhibits poor ductility and potential fusion discontinuities.

Answer

The weld has insufficient tensile strength.

Answer

The base metal has a high degree of hardness.

Answer

The weld metal has an excessively high impact resistance.

Question 3

When performing a transverse tensile test on a butt weld, where is the specimen typically machined to ensure the failure occurs within the weld metal, heat-affected zone, or base metal, rather than at the grips?

Accepted Answer

Across the weld, perpendicular to the weld axis

Answer

Along the weld seam, parallel to the weld axis

Answer

From the base metal away from the weld

Answer

From the heat-affected zone only

Question 4

Which destructive test involves sectioning a weld, polishing the cross-section, and then etching it with a chemical reagent to reveal the weld profile, penetration, and any internal discontinuities?

Accepted Answer

Macroetch test

Answer

Radiographic test

Answer

Ultrasonic test

Answer

Liquid penetrant test

Question 5

A CWI needs to verify the actual dimensions of a fillet weld, including leg length and throat thickness, after welding. Which destructive testing procedure would be MOST suitable for precise measurement and visual examination of the internal profile?

Accepted Answer

Macroetch examination of a sectioned fillet weld

Answer

Tensile testing of the fillet weld

Answer

Hardness testing across the fillet weld

Answer

Fillet weld break test

Question 6

During a destructive examination, a weld coupon is subjected to a load that causes it to fracture. The energy absorbed by the material during this process is measured. What property is being evaluated?

Accepted Answer

Impact toughness

Answer

Tensile strength

Answer

Hardness

Answer

Yield strength