Nate Core Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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To what volume should refrigerant cylinders typically be filled?

50% by volume

80% by volume

Refrigerant cylinders are typically filled to 80% of their total volume to ensure safe and efficient storage of the refrigerant. Filling cylinders to this level allows for the expansion of the refrigerant, which can change state from liquid to gas depending on temperature and pressure.

If a cylinder were to be filled completely, or to 100% of its capacity, there would be insufficient space for the refrigerant vapor, which could lead to over-pressurization and potential ruptures or safety hazards. In contrast, filling to a lower percentage, such as 50% or 30%, would not maximize the capacity of the cylinder and could result in inefficient use of the available storage space. Thus, the 80% volume fill is a standard safety practice in the handling and storage of refrigerants.

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100% by volume

30% by volume

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