Red Seal Sheet Metal Worker Practice Exam

What is the role of dampers in an HVAC system?

1. To filter dust and allergens

2. To control humidity levels

3. To control airflow within the ductwork

4. To regulate temperature

The correct answer is: To control airflow within the ductwork

Dampers play a crucial role in HVAC systems by controlling airflow within the ductwork. They are mechanical devices that can open, close, or partially obstruct the flow of air. This ability to modulate airflow allows for better distribution of heated or cooled air throughout a building, improving overall comfort and energy efficiency. By adjusting the position of dampers, HVAC technicians can balance the air pressure and ensure that different areas of a space receive the appropriate amount of air, which is essential for maintaining consistent temperatures and enhancing system performance. While filtering dust and allergens, controlling humidity levels, and regulating temperature are important functions in an HVAC system, they are primarily managed by other components such as filters, humidifiers, and thermostats. Dampers specifically focus on the control of airflow, making them essential for the effective operation of the entire system.