Question

question 22
a high - pressure appliance containing less than 200 lbs. of an hcfc or hfc refrigerant must be evacuated (recovered) to a level of;
a 15 inches of vacuum
b 10 inches of vacuum
c 4 inches of vacuum
d 0 inches of vacuum

Explanation:

In the field of refrigeration - related regulations, a high - pressure appliance with less than 200 lbs of an HCFC or HFC refrigerant must be evacuated to 4 inches of vacuum. This is a standard requirement for proper refrigerant recovery.

Answer:

C. 4 inches of vacuum