Nate Electrical Practice Exam

Which component is commonly found in a typical HVAC system to control airflow?

1. Capacitor

2. Transformer

3. Blower motor

4. Sensors

The correct answer is: Blower motor

A blower motor is a critical component in a typical HVAC system responsible for controlling airflow. It functions by generating the necessary air movement throughout the system, ensuring that conditioned air is distributed to different spaces efficiently. The blower motor drives the fans that pull air from the return ducts, push it across the heat exchanger or cooling coils, and ultimately deliver it through the supply ducts back into the living areas. In HVAC systems, controlling the airflow is essential for maintaining indoor air quality, balancing temperatures, and operating efficiently. The blower motor's performance is directly linked to the comfort and efficiency of the heating and cooling processes, making it a key element in managing overall system effectiveness. While other components like capacitors, transformers, and sensors play important roles within an HVAC system—capacitors assist in starting and stabilizing the operation of motors, transformers convert voltage for electrical components, and sensors monitor and provide feedback on conditions within the system—they do not control the airflow in the way that the blower motor does. Thus, the blower motor is specifically designed for this purpose, making it the correct answer.