Refrigerant Lubricants (Oils)

The 3 mineral oils commonly used in refrigeration and air conditioning applications are:

· Alkylbenzenes

· Glycols

· Esters.

• True

• False

The main function of oil in a refrigeration system is to show the point from which refrigerant is leaking.

• True

• False

The majority type compressor which utilises mineral oils is the centrifugal compressor.

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• False

2 characteristics which make a good refrigerant oil are a low electrical resistance and a high acidity content.

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• False

Synthetic oils been developed to be used with HFC refrigerants because the mineral oils lacked lubricity and miscibility.

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• False

With reference to refrigerant oils, the term “hygroscopic” speaks to the oil’s ability to absorb moisture.

• True

• False

The abbreviation POE is used for the glycol oil created for use with automotive R-134a.

• True

• False