Red Seal Ironworker (Generalist) Practice Exam

Which adhesive is commonly used in iron construction?

1. Super glue

2. Polyurethane adhesive

3. Epoxy adhesive for bonding metals

4. Hot melt adhesive

The correct answer is: Epoxy adhesive for bonding metals

Epoxy adhesive for bonding metals is commonly used in iron construction due to its superior strength and durability. Epoxy adhesives consist of two components—a resin and a hardener—that, when mixed together, create a strong bond capable of withstanding harsh conditions often encountered in construction environments. This type of adhesive is particularly beneficial for ironwork as it can effectively bond metals, providing both structural integrity and resistance to environmental factors like moisture, heat, and chemicals, which makes it ideal for use in steel and iron fabrication and assembly. The ability to create a high-strength bond makes epoxy suitable for load-bearing applications where reliability is paramount. In contrast, the other types of adhesives mentioned do not possess the same strength or versatility for bonding metals. Super glue, for instance, is best suited for small, quick repairs and may not provide the structural support needed in ironwork. Polyurethane adhesives are versatile but may not have the same level of bonding strength for metals as epoxy. Hot melt adhesives are typically used for lightweight applications and are not intended for heavy-duty structural uses like those found in iron construction.