Question

core - question # 1
what type of synthetic oils are commonly used in new hfc systems and for retrofitting hcfc equipment to hfc refrigerants?
a polyolester
b glycol
c alkyl - benzene
d mineral oil

Explanation:

Polyester oils are commonly used in new HFC systems and for retrofitting HCFC equipment to HFC refrigerants due to their good solubility and compatibility with HFC refrigerants. Glycol is not typically used in these systems for this purpose. Alkyl - benzene is more associated with HCFC systems. Mineral oil is not compatible with HFC refrigerants.

Answer:

A. Polyolester