Which of the following refrigerants is conventionally classified as practically immiscible with mineral refrigeration oil?
R - 717
Correct answer: R-717 (ammonia). Ammonia has very limited mutual solubility with conventional mineral refrigeration oil and is classified as practically immiscible with it.
In the standard mineral-oil classification, R-11 and R-12 are completely miscible, whereas R-22 is partially miscible. “Practically immiscible” allows a small amount of dissolution; it does not mean absolute zero solubility. Specifying mineral oil is essential because other lubricant types can behave differently.
Important Questions from Refrigerants
In Lithium-Bromide refrigeration system, Lithium-Bromide is used as
The condenser and evaporator tubes in a Freon refrigeration plant are made of _____.
Improper flaring is directly related with _______.
When retrofitting a CFC-12 system to an HFC-134a system, Which two items must be installed or replaced?
Freon group of refrigerant are ________
