HVAC - EPA Certification Practice Exam

What is the main function of a suction line filter?

1. To reduce pressure in the system

2. To trap debris to protect a new compressor

3. To enhance refrigerant flow

4. To maintain temperature stability

The correct answer is: To trap debris to protect a new compressor

The primary role of a suction line filter is to trap debris and contaminants, thereby protecting the compressor from potential damage. Compressors are sensitive components that can be severely affected by debris entering the system, which may lead to inefficient operation or failure. By filtering out particulates and ensuring only clean refrigerant flows into the compressor, the suction line filter plays a critical role in increasing the reliability and longevity of the HVAC system. While other functions may be important in an HVAC system, such as maintaining pressure or refrigerant flow, these are not the primary duties of the suction line filter. Instead, it specifically targets impurities that could compromise system performance.