Refrigeration Plant Operator B Practice Test

Which component in an air compressor system is used to cool compressed air?

1. Intercooler

2. Pressure switch

3. Separator

4. Compressor head

The correct answer is: Intercooler

The intercooler is a critical component in an air compressor system that functions to cool the compressed air. When air is compressed, it generates heat due to the increased pressure. This elevated temperature can negatively impact the efficiency of the system and the performance of downstream components. The intercooler is designed to remove this heat from the compressed air before it enters the next stage of compression or is used in the application. By effectively cooling the air, the intercooler reduces the volume of air that needs to be compressed in subsequent stages, ensuring that the compressor operates more efficiently and prolongs its lifespan. This cooling process helps minimize the risk of overheating, which can lead to mechanical failures or degradation of the compressed air quality. Other components serve different purposes. For instance, a pressure switch monitors the pressure levels in the system but does not cool the air. A separator is used to remove moisture and contaminants after the air has been compressed. The compressor head itself is where the actual compression of the air occurs, but it does not perform the cooling function.