Question

question # 25
which of the following refrigerants is classified as a very high - pressure refrigerant?
a cfc-11
b r-744
c hcfc-123
d r-410a

Explanation:

R - 744 (carbon dioxide) is a very high - pressure refrigerant. CFC - 11 and HCFC - 123 are low - pressure refrigerants, and R - 410A is a high - pressure refrigerant but not as high as R - 744.

Answer:

B. R-744