HVAC Metering Devices Practice Test 2026 – The All-in-One Guide to Mastering Your Exam!

The metering device in a cooling system serves a crucial role in regulating the flow of refrigerant between the condenser and the evaporator. Positioned between these two components, the metering device reduces the pressure of the refrigerant coming from the condenser, allowing it to expand before it enters the evaporator.

As the refrigerant flows from the condenser, it is in a high-pressure, liquid state. The metering device ensures that when the refrigerant reaches the evaporator, it is at a lower pressure and is ready to absorb heat from the indoor environment. This pressure drop is essential for the refrigerant to evaporate properly within the evaporator coils, converting it into a vapor as it absorbs heat.

Understanding this arrangement is vital for anyone working with HVAC systems, as the efficiency of the cooling process greatly depends on the proper functioning of the metering device in managing refrigerant flow between these two critical components.