ESCO Air Conditioning Practice Exam 2025 – The All-in-One Guide to Exam Success!

To determine the operating system superheat, we need to calculate the saturation temperature corresponding to the given pressure in the suction line and then compare it to the actual temperature of the refrigerant at the evaporator outlet.

For R-410A, the pressure of 124 psig corresponds to a saturation temperature of approximately 54°F. However, to find the superheat, we would typically refer to a saturation temperature lookup chart specific to R-410A to ensure accuracy.

Assuming the saturation temperature at 124 psig is indeed close to 54°F, we can then calculate the superheat. Superheat is determined by the formula:

Superheat = Actual suction line temperature - Saturation temperature at the suction line pressure

In this case, if the suction line temperature is also 54°F, which is equal to the saturation temperature, then the superheat would calculate to:

Superheat = 54°F (actual temperature) - 54°F (saturation temperature) = 0°F

However, if the actual measured temperature was higher than 54°F, it would indicate the degree of superheating. Given that the answer of 10°F suggests an actual temperature of around 64°F, which exceeds the saturation temperature of