ESCO Air Conditioning Practice Exam

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If a 30 pound cylinder of reclaimed R-410A refrigerant has been stored overnight at 70°, the pressure in the cylinder should be approximately

  1. 201 psig

  2. 250 psig

  3. 150 psig

  4. 300 psig

The correct answer is: 201 psig

When a 30-pound cylinder of R-410A refrigerant is stored overnight at 70°F, the pressure in the cylinder should be approximately 201 psig. This is because R-410A is a blended refrigerant that behaves differently than single-component refrigerants. At 70°F, the pressure in a cylinder of R-410A should be around 201 psig based on the saturation pressure-temperature relationship of the refrigerant. Options B, C, and D can be eliminated because they do not align with the typical pressure corresponding to the given storage conditions for R-410A refrigerant.

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