Red Seal Sheet Metal Worker Practice Exam

What is the importance of flange in ductwork?

1. It creates a decorative edge

2. It reduces noise in the ducts

3. It provides a surface for connection to other ducts or equipment

4. It assists with insulation

The correct answer is: It provides a surface for connection to other ducts or equipment

The importance of a flange in ductwork primarily lies in its function as a connection point. Flanges provide a flat surface that allows for the secure attachment of different sections of ductwork or to various pieces of equipment. This connection capability is vital for maintaining the integrity of the air handling system, as it ensures that ducts can come together without significant gaps that would otherwise allow air leaks, reduce efficiency, or lead to pressure loss in the system. In terms of installation, flanges also facilitate easier assembly and disassembly of duct components, which can be beneficial for maintenance or repairs. They are often installed with bolts or screws, making it simple to achieve a tight and reliable connection. This aspect is fundamental in ensuring optimal airflow and the overall effectiveness of heating, ventilation, and air conditioning (HVAC) systems.