HVAC 403A Practice Exam

The key idea is the state of the refrigerant as it leaves the condenser and precedes the metering device: it is a high-pressure subcooled liquid. The condenser removes heat from the refrigerant and turns it into a liquid at the condenser pressure, and then further cooling (subcooling) lowers its temperature below the saturation temperature for that pressure. This ensures the refrigerant stays in the liquid phase when entering the expansion device, preventing flash gas and improving system efficiency. While it is also liquid and at high pressure, the defining characteristic here is that it is subcooled, which is why this choice best describes the condition.