NFPA-99 Practice Exam

What may occur if oil contamination is present during brazing?

1. It enhances the joint strength

2. It leads to corrosion of materials

3. It promotes efficient heating

4. It creates a glossy finish

The correct answer is: It leads to corrosion of materials

When oil contamination is present during the brazing process, it can lead to corrosion of materials. This occurs because oils can impede the proper flow of the brazing alloy, potentially leading to imperfect joints or weak points. The presence of oil can also create residues that attract moisture, resulting in corrosion over time. Brazing relies on clean surfaces to ensure effective bonding between metals, and contamination by oil disrupts this process, increasing the likelihood of corrosion and reducing the durability of the joint. Enhancing joint strength, promoting efficient heating, or creating a glossy finish are not desirable outcomes associated with oil contamination during brazing. In fact, these would typically be viewed as negative effects that compromise the integrity and quality of the brazed joint. Understanding these implications is critical for ensuring the long-term performance and reliability of brazed connections in applications where safety and functionality are paramount.