SkillCat EPA Type 2 Practice Test

Which statement about ternary blends is correct?

A blend of two different refrigerants. A blend of three different refrigerants. A blend of four different refrigerants. A single refrigerant.

Correct Answer:

A blend of three different refrigerants.

Explanation:

Ternary blends involve three components. In refrigeration, a ternary blend is a mixture of three different refrigerants chosen to achieve specific pressure, temperature glide, and performance characteristics. That’s why describing a blend of three refrigerants is the right characterization. A blend of two would be binary, a blend of four would be quaternary, and a single refrigerant is not a blend at all. An example of a ternary blend is R-407C, which combines three different refrigerants to meet desired cooling performance.

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