Alberta Boilers Safety Association (ABSA) Practice Test

What term describes flaws in a weld deposit due to gas entrapment?

1. Undercut

2. Porosity

3. Inclusions

4. Incomplete penetration

The correct answer is: Porosity

Porosity is the term that precisely describes flaws in a weld deposit resulting from gas entrapment. When molten weld metal solidifies, any gases trapped within can create tiny holes or voids in the finished weld, which are referred to as pores. This phenomenon compromises the integrity and strength of the weld, as these small cavities can reduce the load-bearing capacity and affect the overall durability of the welded joint. Understanding porosity is crucial in welding processes as it directly relates to the quality of the weld. Techniques to minimize gas entrapment include ensuring proper shielding gas coverage, maintaining correct travel speeds, and using appropriate materials. Identifying and addressing porosity is fundamental to achieving high-quality welds in various applications.