Air Conditioning Repair Certification (ETI) 2025 – 400 Free Practice Questions to Pass the Exam

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If a 30-pound cylinder of reclaimed R-410A refrigerant is stored overnight at 70 degrees Fahrenheit, what should its pressure approximately be?

143 PSIG

The pressure of a refrigerant like R-410A stored in a cylinder is directly related to its temperature according to its saturation pressure characteristics. When a cylinder of R-410A is kept at 70 degrees Fahrenheit, the pressures can be predicted based on industry-standard refrigerant pressure-temperature charts.

At 70 degrees Fahrenheit, the saturation pressure for R-410A is typically around 143 PSIG. This means that at this temperature, the refrigerant in the cylinder is in equilibrium, and the vapor pressure of the refrigerant corresponds to this specific pressure reading. Therefore, if the cylinder is functioning optimally without any leaks or other issues, it will hold this approximate pressure at the specified temperature.

Understanding this saturation pressure is essential in evaluating the storage conditions and ensuring the safe handling of refrigerants, as the pressure can significantly affect handling and usage during repair and maintenance of HVAC systems.

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70 PSIG

50 PSIG

30 PSIG

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