CWI Destructive Testing and Properties 3

Question 1

What is the primary purpose of a fillet weld break test?

Accepted Answer

Evaluate root penetration and internal soundness of fillet welds

Answer

The fillet weld break test fractures the weld through its throat to expose the root and internal cross-section for visual examination of fusion and discontinuities.

Question 2

Which mechanical property is defined as a material's resistance to permanent deformation under load?

Accepted Answer

Yield strength

Answer

Yield strength is the stress at which a material begins to deform plastically (permanently).

Question 3

The Rockwell B scale uses a 100 kgf load with which indenter?

Accepted Answer

1/16-inch steel ball

Answer

Rockwell B uses a 1/16-inch diameter steel ball indenter with a 100 kgf major load, suitable for softer materials.

Question 4

An all-weld-metal tension test differs from a transverse weld tension test in that it:

Accepted Answer

Tests the mechanical properties of the deposited weld metal alone

Answer

An all-weld-metal tension test extracts the specimen entirely from deposited weld metal, isolating its mechanical properties.

Question 5

When performing a root bend test on a groove weld, the specimen is bent so the:

Accepted Answer

Weld root is in tension

Answer

In a root bend test, the root of the weld is positioned on the tension (outer) side of the bend to evaluate root fusion and ductility.

CWI Practice Test

CWI Practice Test

CWI Destructive Testing and Properties 3