Which statement is true about refrigerant oil categories?

Which statement is true about refrigerant oil categories?

• A. PAG is not used with refrigerants
• B. POE oils are never used with refrigerants
• C. Mineral oil is a refrigerant oil category
• D. Silicone oil is a refrigerant oil category

Answer: (C)

Refrigerant oil categories depend on the base stock used to lubricate the compressor and their compatibility with the refrigerant. Mineral oil is a recognized category of refrigerant oil; it’s the traditional lubricant used with older refrigerants and is still referenced as a refrigerant oil category. With newer refrigerants, other oils (like PAG and POE) are used because mineral oil doesn’t always provide proper lubrication or compatibility with those refrigerants. The other statements are not correct because PAG and POE oils are indeed used with refrigerants in many systems, and silicone oil is not typically treated as a standard refrigerant oil category in this context.

Refrigerant oil categories depend on the base stock used to lubricate the compressor and their compatibility with the refrigerant. Mineral oil is a recognized category of refrigerant oil; it’s the traditional lubricant used with older refrigerants and is still referenced as a refrigerant oil category. With newer refrigerants, other oils (like PAG and POE) are used because mineral oil doesn’t always provide proper lubrication or compatibility with those refrigerants. The other statements are not correct because PAG and POE oils are indeed used with refrigerants in many systems, and silicone oil is not typically treated as a standard refrigerant oil category in this context.