Low GWP test prep Questions with Detailed Verified Answers

Low GWP Test Questions with Detailed Verified Answers Q: Dry powder class B Ans: Always have this type of fire extinguisher Q: Multimeter Ans: This must be used to verify there is no voltage present before working Q: Ozone Depletion Potential (ODP) Ans: measurement of CFCs and HCFCs ability to destroy the ozone Q: Global Warming Potential (GWP) Ans: a metric that is used to measure a refrigerants environmental impact as a greenhouse gas Q: Condensor Ans: Is a heat transfer component located on the high pressure side of the system Q: Compressor Ans: changes a low pressure low temperature vapor to a high pressure high temperature vapor. Liquid does not belong and can damage it. Q: Metering Device Page | 2 Ans: A component that regulate (and restricts) the amount of refrigerant entering the evaporator. Separates low pressure side from high pressure side Q: TEV Ans: Thermostatic Expansion Vavle Q: AEV Ans: Automatic expansion valve Q: EEV Ans: Electronic expansion valve Q: Evaporator Ans: The component in a refrigeration system that absorbs heat into the system and evaporates the liquid refrigerant. Q: Filter driers Ans: Collects moisture from the refrigerant in a sealed refrigeration system. Q: Liquid line drier Ans: Last longer when installed indoors near metering device Q: Suction line drier Ans: Used on systems that require cleanout after a compressor burnout. Installed on the suction near the compressor. Remove when they become clogged with debris Q: Saturation Page | 3 Ans: Mixture of liquid and vapor Q: Saturation temperature Ans: As the pressure of a saturated refrigerant changes, so does it's boiling or condensing temperature Q: Superheated Vapor Ans: a vapor whose temperature is greater than the saturation temperature Q: Subcooling Ans: Heat removed from a liquid below the refrigerant boiling point Q: Azeotropic Ans: mixture that acts like a single component refrigerant over its entire temperature/pressure range Q: Zeotropic Ans: Is a mixture of 2 or more refrigerants that can separate or fractionate into its original components Q: Near-zeotropic Ans: Blends that have properties that are very close to those of azeotropes. Very low fractionation potential Q: Fractionation Ans: Occurs when one or more of the refrigerants in a blend Leak at a faster rate than other refrigerants in a blend. Only occurs in zeotropic and near-azeotropic blends Q: Temperature glide