Epa 608 Practices Test Verified Questions And Answers 2023

Why might recovery equipment using hermetic compressors overheat? {Ans: drawing a deep vacuum because the unit relies on the flow of refrigerant through the compressor for cooling}If switching from recovering one refrigerant to another, what three steps must be taken before recovering the new refrigerant? What if the refrigerant is R-134A? {Ans: Pack the recovery cylinder in ice and/or apply heat to the appliance. Recover as much as possible in the liquid phase. In order to recover liquid refrigerant, you must connect one hose to the system's liquid line. After recovering liquid refrigerant, any remaining vapor is condensed by the recovery system.}What is a receiver, where is it located and what is the state of the refrigerant after leaving the receiver? {Ans: Systems using thermal expansion valves will have a receiver/tank}When evacuating a vapor compression system, the vacuum pump should be capable of pulling _________________ of vacuum. {Ans: 500 microns (or 29.90" Hg)}What is the EPA definition of a small appliance? {Ans: that is manufactured, charged, and hermetically sealed in a factory and contains five pounds or less of refrigerant.}The __________________rejects the heat from the system and changes the refrigerant from a high-temperature, high-pressure vapor