A refrigerant in the "B" Group that is used more than others in its group in refrigeration systems is:
a. R-290
b. Ammonia
c. R-134a
d. R-22
e. CO2
Answer: b
A refrigerant in the "B" Group that is used more than others in its group in refrigeration systems is:
a. R-290
b. Ammonia
c. R-134a
d. R-22
e. CO2
Answer: b