FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Question: 1 / 1030

What type of oil is suitable for use in a vapor-cycle cooling system?

Automotive engine oil

Special high-grade refrigeration oil

Refrigeration oil is specifically designed for use in refrigeration and cooling systems. Automotive engine oil is not suitable for use in a vapor-cycle cooling system as it is designed for engines and not refrigeration systems. Vegetable oil is not suitable either as it may solidify at low temperatures and may impact the efficiency of the system. Mineral oil is also not suitable as it may not have the appropriate properties for use in a cooling system. Special high-grade refrigeration oil is the best choice as it is specifically designed for use in vapor-cycle cooling systems and has the appropriate properties to keep the system running smoothly.

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Vegetable oil

Mineral oil

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