Visual Testing (VT) Practice Exam

Which defect is commonly found in welds and may impact their integrity?

1. Pores

2. Inadequate penetration

3. Both A and B

4. None of the above

The correct answer is: Both A and B

The integrity of welds is crucial for the strength and reliability of the structures they form. Defects such as pores and inadequate penetration can significantly compromise this integrity. Pores are small voids that can form within a weld bead due to factors like gas entrapment or contamination during the welding process. These pores can weaken the material by reducing its load-bearing capacity and may lead to fatigue failure over time. Inadequate penetration occurs when the weld does not sufficiently join the base materials, leaving a gap that can create a weak point. This defect can result from improper technique, insufficient heat input, or incorrect filler material, leading to a welded joint that may not be able to withstand operational stresses. Since both of these defects—pores and inadequate penetration—can independently affect the mechanical properties of a weld, their presence indicates a reduction in the overall integrity of the welded joint. Therefore, the answer correctly identifies that both defects are commonly found in welds and may impact their integrity.