What is the difference between a disposable refrigerant cylinder and a refillable
What is the difference between a compound and a zoetrope?
What is the difference between a zoetrope and an azeotrope?
What contaminants can be found in refrigerant?
State two reasons ammonia has limited use.
What refrigerant is being used in small appliances in place of R-12?
What refrigerant is being used in new air conditioning systems in place of R-22?
When working with ammonia, what safety equipment must be available?
How can the presence of non-condensables be detected in a refrigerant cylinder?