Red Seal Sheet Metal Worker Practice Exam

What is the role of a duct hanger in HVAC systems?

1. To secure ductwork in position

2. To filter air within ducts

3. To adjust air pressure

4. To provide insulation

The correct answer is: To secure ductwork in position

The role of a duct hanger in HVAC systems is to secure ductwork in position. Properly installed duct hangers help maintain the integrity and alignment of the ductwork, preventing sagging or displacement that could disrupt airflow and system efficiency. Ensuring ductwork is stable and correctly supported is critical for maintaining optimal performance of heating, ventilation, and air conditioning systems. Other functions mentioned in the options, such as filtering air, adjusting air pressure, and providing insulation, are handled by different components in the HVAC system. Filters are separate components designed specifically to remove particulates and contaminants from the air, while adjustable dampers or vents are utilized to control airflow and pressure. Insulation is applied to ductwork but involves materials designed to reduce heat loss or gain rather than structural support. Thus, securing the ductwork is a primary function of duct hangers, which is essential for the overall effectiveness and efficiency of an HVAC system.