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

Tensile strength of the weld metal

Answer

Hardness of the heat-affected zone

Answer

Yield strength at elevated temperature

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

Nick-break test

Answer

Macro-etch test

Answer

Tension test

Question 3

A face bend specimen is bent so that the:

Accepted Answer

Face of the weld is in tension

Answer

Root of the weld is in tension

Answer

Side of the weld is in tension

Answer

Base metal is in tension only

Question 4

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

Accepted Answer

Notches sawed into the weld edges

Answer

A drilled hole at the weld centerline

Answer

A hardness indent at the root

Answer

A thermal score across the HAZ

Question 5

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

Accepted Answer

Internal weld discontinuities and fusion quality

Answer

Surface porosity counts

Answer

Weld spatter distribution

Answer

Surface undercut depth

Question 6

The Vickers hardness test uses which type of indenter?

Accepted Answer

Diamond pyramid

Answer

Steel ball

Answer

Brale conical diamond

Answer

Tungsten carbide ball

Question 7

In a transverse tensile test of a weld, where must fracture occur for the test to be considered acceptable per most codes?

Accepted Answer

Anywhere, as long as UTS meets minimum requirements

Answer

In the weld metal only

Answer

In the HAZ only

Answer

Only outside the weld zone