NATE Air Conditioning and Heat Pumps Practice Exam 2025 – All-in-One Guide to Master Your Certification!

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Question: 1 / 400

The maximum temperature at which refrigerant may be stored is ____°F when the container is no more than ____% full of liquid by volume.

120°F, 60%

125°F, 60%

125°F, 80%

The correct answer reflects established safety guidelines regarding the storage of refrigerants. Refrigerants are volatile substances that can generate high pressures and temperatures within their containers. The maximum temperature limit, in this case, is set at 125°F when the container is no more than 80% full of liquid by volume.

This guideline is crucial because as the temperature of the refrigerant increases, so does the pressure inside the container. By allowing for an 80% fill, there is sufficient headspace to accommodate the thermal expansion of the liquid refrigerant without exceeding the design pressure of the container, thereby minimizing the risk of ruptures or leaks.

Maintaining both the specified maximum temperature and the liquid fill level helps ensure that refrigerants can be stored safely and effectively without compromising the integrity of the container or posing safety hazards.

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135°F, 80%

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