CWI Destructive Testing and Properties 2

Question 1

In a Charpy V-notch impact test, what does the absorbed energy value primarily indicate?

Accepted Answer

Toughness or notch ductility of the material

Answer

The Charpy V-notch test measures the energy absorbed during fracture, which is a direct measure of toughness or notch ductility.

Question 2

Which destructive test is specifically designed to evaluate the ductility of a weld and its surrounding base metal by bending the specimen?

Accepted Answer

Guided bend test

Answer

The guided bend test uses a jig to bend specimens to a specified angle to evaluate weld ductility and soundness.

Question 3

A face bend specimen is bent so that the:

Accepted Answer

Face of the weld is in tension

Answer

In a face bend test, the weld face is placed on the outer (tension) side of the bend.

Question 4

During a nick-break test, what feature is deliberately introduced to initiate fracture?

Accepted Answer

Notches sawed into the weld edges

Answer

Saw-cut notches are made along both edges of the weld bead to ensure fracture occurs through the weld metal.

Question 5

What does a macro-etch test reveal that a visual inspection cannot?

Accepted Answer

Internal weld discontinuities and fusion quality

Answer

Macro-etch testing uses acid to reveal internal weld cross-section features including fusion, penetration, and subsurface discontinuities.

CWI Practice Test