System-dependent recovery methods may only be used on appliances containing;

With an air cooled condenser on the roof of a building and the evaporator on the first floor, recovery should first occur;

Small appliances in recreational vehicles may use refrigerants such as Ammonia, Hydrogen, and water. These refrigerants;

Recovering multiple types of refrigerants in the same cylinder;

Self-contained or active recovery equipment;

Service technicians who violate Clean Air Act provisions:

Blended refrigerants leak from a system:

Which of the following is an example of an HCFC refrigerant?

Production of CFC refrigerants became illegal on January 1, ____________________.

Cooling occurs in a direct- expansion vapor compression refrigeration system when: