If a 30-pound cylinder of reclaimed R-410 refrigerant has been stored at 70°F overnight, what would you expect the pressure to be?

The pressure of a refrigerant in a cylinder is directly related to its temperature, as specified by the saturation pressure-temperature relationship for that refrigerant. For R-410A, when the refrigerant is at a temperature of 70°F, the expected pressure is in the range of approximately 200 psig.

When considering the properties of R-410A at 70°F, the saturation pressure is typically around 201 psig. This means that at this temperature, the refrigerant is in a state where the pressure corresponds to the temperature of 70°F, and since the refrigerant has been stored without any external pressure influences, it is reasonable to expect the pressure to reflect this saturation point.

Thus, the correct answer is aligned with the known saturation pressure for R-410A at that specific temperature, confirming that the expected pressure in the cylinder would indeed be around 201 psig.