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CFC Core
EPA 608 Core Flash Cards
| Question | Answer |
|---|---|
| Which refrigerant has the highest ozone depletion potential? | R-22 |
| The clean air act requires technicians to: | Be certified to handle regulated refrigerants |
| What is the primary purpose of refrigerant recovery? | Prevent release of refrigerants into the atmosphere |
| What color is the top of a recovery cylinder? | Gray body, yellow top |
| If a large refrigerant leak occurs in a confined space, what is the main hazard? | Oxygen displacement |
| Before using recovery equipment, you should: | Check that the equipment is certified |
| Why is it important not to mix refrigerants? | It makes recovery and recycling difficult or impossible |
| What is the purpose of evacuating a system to a deep vacuum? | Remove air and moisture |
| Which of the following is a hydrofluorocarbon (HFC)? | R-22 |
| At room temperature, refrigerants in a sealed container are typically | A mix of liquid and vapor |
| What is used as the baseline measurement for Global Warming Potential | Carbon Dioxide (CO2) |
| What does CFC stand for | Chlorofluorocarbon |
| What does HCFC stand for | Hydrochlorofluorocarbon |
| What does HFC stand for | Hydrofluorocarbon |
| What does HFO stand for | Hydrofluoroolefin |
| What does HC stand for | Hydrocarbon |
| Low pressure refrigerants range from | 30 psig or lower at 104 degrees |
| Medium pressure refrigerants range from | 30 psig to 155 psig at 104 degrees |
| High pressure refrigerants range from | 155 psig to 340 psig at 104 degrees |
| Very high pressure refrigerants range from | 340 psig and higher at 104 degrees |
| The Clean Air Act_. | prohibits CFC/HCFC venting as of July 1,1992 |
| is a CFC refrigerant? | R-12 |
| Ozone depletion in the stratosphere is | global |
| One of the most serious results of damage to the ozone layer is. | increase in human skin cancer |
| Some state and local governments may establish laws that_. | supersede EPA regulations |
| Whenever dry nitrogen from a portable cylinder is used in service and installation practice, the most important safety consideration is that. | a relief valve is inserted in the downstream line from the pressure regulator |
| is a chlorine-free refrigerant? | HFC-134a |
| When evacuating a system, the use of a large vacuum pump could cause to freeze. | trapped water |
| In order to verify the allowable refrigeration system test pressure, check | the design pressure on the equipment |
| Refrigerant entering the compressor of a refrigeration system is a_ | superheated vapor |
| What does ODP stand for | Ozone Depletion potential |
| Which atom in CFC and HCFC molecules causes ozone depletion | Chlorine |
| What do technicians do with refrigerant before opening or disposing of any appliance | Recover |
| What forms when moisture is present in an operating refrigeration system | Acid |
| What is the state of refrigerant entering the compressor | Vapor |
| What international agreement led to phase-out of ozone-depleting substances | Montreal(protocol) |
| What gas is commonly used to pressurize a system for leak checking after recovery | Nitrogen |
| A single chlorine atom can destroy up to how many ozone molecules | 100,000 |
| What is the required recovery level for most small appliances before disposal? | 90% |
| What is the maximum fill level for a recovery cylinder to allow for safe expansion | 80% |
Created by:
AHR-160