CFESA Refrigeration Chapter 24 Questions And Answers Rated A+ New Update Assured Satisfaction

You will need to purchase separate jaws for the Looking installation tool according to the tubing size. T or F - True Before opening a HC sealed system after the refrigerant has been removed you must? - Purge is for a minimum 5 minutes with nitrogen. What is different about HC compressor starting components? - The all electrically sealed to prevent any arcing. What is different about servicing Hydrocarbon (HC) refrigeration systems? - Refrigerant is flammable and potentially explosive. The two most common Hydrocarbon refrigerants are? - R290B and R600B Where must every replacement part for a Hydrocarbon refrigeration system be purchased? - The OEM equipment manufacturer. You can recover refrigerant with your recovery unit. True or- False - False Every Hydrocarbon refrigeration compressor will have what markings on it? - The refrigerant used and warning labels. How must HC refrigerants be removed from the refrigeration system? - Purged from the system to a safe place outdoors. Do hydrocarbon refrigerants need to be recovered? - They do not. They are exempt by the EPA. What kind of leak detector is used to detect HC refrigerants? - High quality combustible leak detector.The HC leak detector only needs to be used when leak testing. Tor F - False It needs to be on the entire time the system is opened until it has been totally purged out, and whenever there is any refrigerant in the system! If you suspect a problem in the sealed system how should you try to verify it before opening the system? - 11. By temperatures to ballpark superheat and subcooling. How do all brazed in components in a HC refrigeration systems need to be removed? - Cut out with tubing cutters When brazing any component into a HC refrigeration system it is mandatory that you do what? - Nitrogen must be purging through the system. All HC refrigerants must be charged into a HC refrigeration system by? - 15. Weight, using an accurate digital scale As an alternative to brazing connections in a HC refrigeration system you can use? - Lokring fittings Is it ever allowable to leave service access valves in a HC refrigeration system? - No Most OEM HC equipment manufacturers insist that the system be capped of with? - Lokring caps. What is the maximum refrigerant charge that can be used according to the EPA in refrigeration systems in the US? - 5.3ozHow many jaws will you need to purchase? - 2 for each size you will use.