EPA 608 (2023) Exam with correct Answers

the state of the refrigerant entering the metering device is? - Answer- A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? - Answer- R-503 what type of refrigerant ...

the state of the refrigerant entering the metering device is? - Answer- A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? - Answer- R-503 what type of refrigerant is used in MEDIUM pressure appliances? - Answer- R-500 what type of refrigerant is used in HIGH pressure appliances? - Answer- R-410A and R-22 what device is located at the END of the liquid line? - Answer- The expansion device. what type of refrigerants are the LEAST harmful to the ozone layer? - Answer- HFC refrigerants. How much money does the EPA offer to individuals who report information about others who vent refrigerants into the atmosphere? - Answer- $10,000. which class of refrigerants does R-22 fall into? - Answer- The HCFC class. (hydrochloroflurocarbons) which gas should be used when checking for leaks in various systems? - Answer- Nitrogen. which term describes the process of changing a refrigerant from a liquid to a gas using HEAT? - Answer- Latent heat. refrigerants in the SUCTION line are in what phase and state? - Answer- Cold vapor. how many miles above the Earth's surface does the ozone layer in the stratosphere extend? - Answer- 31 miles. what year was the Montreal Protocol put in place? - Answer- 1989. refrigerant recovery equipment should be checked for (blank) on a daily basis? - Answer- Refrigerant leaks and oil levels. should recovery machines be used on equipment that contains hydrogen? - Answer- NO. which purity test is used to determine the type of refrigerant? - Answer- ARI 700. what type of unit only requires ONE service connection? - Answer- self-contained recovery units. air will cause (blank) discharge pressures in a refrigeration system. - Answer- Higher. a strong odor is around during the recovery process. what is most likely the cause of this? - Answer- A compressor burnout. what is the best way (position) to transport refrigeration cylinders? - Answer- Upright. you can only accurately read refrigerant pressure with a stable (blank)? - Answer- Temperature. an explosion can occur if (blank) is vented in an enclosed environment? - Answer- Hydrogen. can refrigerants be mixed in a recovery tank? - Answer- NO. what is the state of refrigerant leaving the liquid receiver? - Answer- High pressure liquid. what is the minimum microns a vacuum pump must pull when evacuating a system? - Answer- 500 microns. what is usually contained in refrigerants made before 1950? - Answer- SO2. (sulfur dioxide) what prevents transient slugs of liquid from getting into the compressor? - Answer- Accumulator. what is the filter drier responsible for removing? - Answer- Moisture and Particulates. can the compressor compress liquid? - Answer- NO. what is the best leak-checking procedure for a pressure decay test? - Answer- Nitrogen. when the annual leak rate exceeds (blank), all comfort cooling systems with more than 50lb of refrigerant must be repaired. - Answer- 15% True or False. the receiver is not part of the low side of a system located in a refrigeration system? - Answer- True. how often should leaks be checked in the recovery or recycling unit for commercial refrigeration equipment? - Answer- 3 months. how can you check if there is excess air / non-condensables in the tank? - Answer- Checking the pressure inside the recovery tank. Reference the pressure / temperature chart. what type of system can a vacuum pump be used on for recovery? - Answer- System-dependent (passive) recovery. when using a system-dependent recovery system with an operating compressor, where should the refrigerant be recovered from? - Answer- High side of the system. when using a system-dependent recovery system with a non-operating compressor, where should the refrigerant be recovered from? - Answer- Both high and low side. how can you release trapped refrigerants in the oil during recovery? - Answer- Heat and tap the compressor with a mallet. when should piercing type valves be