Question

question # 23
refrigerants cfc - 12, hcfc - 22, and hfc - 134a are all classified as type ____ substance
a b - 1
b b - 2
c a - 1
d a - 2

Explanation:

CFC - 12, HCFC - 22, and HFC - 134a are refrigerants. In the context of refrigerant safety classifications, they are type A - 1 substances. Type A indicates low - toxicity and type 1 indicates non - flammability.

Answer:

C. A - 1