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EPA Small Appliances Flashcards
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EPA Small Appliances Flashcards

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Questions and Answers

Which of the following are included in EPA's definition of a small appliance? (Select all that apply)

  • Can be repaired with basic tools
  • Not designed for commercial use
  • Products fully manufactured, charged and hermetically sealed in a factory (correct)
  • Requires external refrigerant charging

    • What is an approved substitute refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers?

    R-600A

    Hydrocarbons are approved for retrofit into existing household refrigerators.

    False

    What percentage of the refrigerant must recovery devices recover when the compressor is operating?

    <p>90%</p> Signup and view all the answers

    Who must certify recovery equipment used for small appliances that use CFCs, HCFCs, and HFCs?

    <p>An EPA certified laboratory</p> Signup and view all the answers

    What standard must equipment used to recover refrigerants from small appliances meet?

    <p>Recover 80% of the refrigerant with an inoperative compressor and 90% with an operative compressor</p> Signup and view all the answers

    The sale of CFC, HCFC, and HFO refrigerants is restricted to which type of technicians?

    <p>Technicians who are EPA certified in refrigerant recovery</p> Signup and view all the answers

    It is mandatory to repair a leak in a small appliance when servicing it.

    <p>False</p> Signup and view all the answers

    What describes low loss fittings on refrigerant recovery devices?

    <p>They can be either manually closed or automatically closed when disconnected.</p> Signup and view all the answers

    Which refrigerant is very high pressure and generally does NOT need to be recovered?

    <p>R-744</p> Signup and view all the answers

    What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated?

    <p>Turn the refrigerant in for reclamation</p> Signup and view all the answers

    If a reclamation facility receives a tank of mixed refrigerant, what may they do?

    <p>Refuse to accept the refrigerant or charge extra for processing it</p> Signup and view all the answers

    The system dependent (passive) recovery process can be performed on a system with a non-operating compressor.

    <p>False</p> Signup and view all the answers

    What should be done to the fitting when installing access fittings onto a sealed system?

    <p>The fitting should be leak tested</p> Signup and view all the answers

    A standard vacuum pump designed specifically for evacuation can be used as a recovery device.

    <p>False</p> Signup and view all the answers

    How many access valves are needed to recover the refrigerant on a sealed system with an operating compressor that has a completely restricted capillary tube?

    <p>Only one access valve, on the high side of the system</p> Signup and view all the answers

    What can be done to speed up the recovery process from a frost-free refrigerator?

    <p>Turn on the defrost heater to increase the refrigerant's temperature and vaporize any liquid</p> Signup and view all the answers

    What is required when attaching a gauge set to check system pressures?

    <p>Have manual or self-sealing valves to minimize any release of refrigerant</p> Signup and view all the answers

    What must be done to the refrigerant vented off the top when filling a charging cylinder?

    <p>The refrigerant must be recovered if it is a CFC, HCFC, or HFC</p> Signup and view all the answers

    Why should technicians watch for signs of contamination in the oil during refrigerant recovery?

    <p>The system will have to be flushed if contaminants are present</p> Signup and view all the answers

    Why should low and high access valves be installed when recovering refrigerant from a household refrigerator?

    <p>To improve speed of recovery</p> Signup and view all the answers

    Which of the following are recommended safe work practices when recovering refrigerants? (Select all that apply)

    <p>Wear safety eyewear</p> Signup and view all the answers

    When using nitrogen in repairing a sealed refrigeration system, what should the nitrogen tank always be equipped with?

    <p>Regulator</p> Signup and view all the answers

    A very large refrigerant leak can cause suffocation because refrigerants are lighter than air.

    <p>False</p> Signup and view all the answers

    What can CFC and HCFC refrigerants decompose into at high temperatures?

    <p>Hydrochloric and hydrofluoric acids</p> Signup and view all the answers

    Permanent safety markings are required on the exterior of household refrigerators using HC refrigerants.

    <p>False</p> Signup and view all the answers

    What is typically used on small appliances for adding or removing refrigerant?

    <p>A service aperture is not present because small appliances are exempt from this requirement</p> Signup and view all the answers

    What type of appliances can technicians charge and open after passing the Type 1 examination?

    <p>Appliances containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at factory</p> Signup and view all the answers

    What do EPA section 608 rules require from technicians in terms of HCFCs and HFCs recovery from small appliance sealed systems?

    <p>Capture of 80% using either a passive or an active recovery process</p> Signup and view all the answers

    An MVAC-like system that holds three pounds of R-12 meets the criteria for Type 1 appliance certification.

    <p>False</p> Signup and view all the answers

    When recovering refrigerant into a non-pressurized container, what is necessary when the compressor is inoperative?

    <p>Chase refrigerant from the oil with pressurized dry nitrogen</p> Signup and view all the answers

    When R-410A is recovered from an appliance, what should it be recovered into?

    <p>A recovery vessel that is clearly marked</p> Signup and view all the answers

    It is essential to help release trapped refrigerant from the compressor oil during recovery when using self-contained recovery devices.

    <p>True</p> Signup and view all the answers

    Which condition requires accessing both high and low sides of the system for refrigerant recovery?

    <p>When the compressor does not run</p> Signup and view all the answers

    What percentage of the nameplate charge must technicians recover from a CFC, HCFC, or HFC system with an operating compressor?

    <p>80%</p> Signup and view all the answers

    What is the approximate pressure of a storage cylinder of recovered R-134a stored at room temperature (80F)?

    <p>87 psig</p> Signup and view all the answers

    What gases can CFC and HCFC refrigerants decompose into at high temperatures?

    <p>Phosgene gas</p> Signup and view all the answers

    Permanent safety markings are required on the exterior of household refrigerators using HC refrigerants.

    <p>False</p> Signup and view all the answers

    Which of the following statements about propane cylinders is true?

    <p>Propane cylinders for grilling contain impurities that can damage refrigeration equipment</p> Signup and view all the answers

    Which type of refrigerant is the most harmful to stratospheric ozone?

    <p>CFCs</p> Signup and view all the answers

    Hydrocarbons are approved for retrofit into existing household refrigerators.

    <p>False</p> Signup and view all the answers

    What type of certification is required for persons recovering CFCs, HCFCs, or HFCs during maintenance of small appliances?

    <p>Type 1 technician or universal technician</p> Signup and view all the answers

    For which refrigeration systems is it permissible to use a passive recovery device for recovery of HFCs, CFCs, and HCFCs?

    <p>A domestic refrigerator</p> Signup and view all the answers

    Persons working on small appliances are exempt from having at least one self-contained recovery machine available.

    <p>True</p> Signup and view all the answers

    New household refrigerators may be factory charged with any refrigerant except for which one?

    <p>R-404A</p> Signup and view all the answers

    What is the approximate pressure of a storage cylinder of recovered R-404A stored at room temperature (80F)?

    <p>174 psig</p> Signup and view all the answers

    What condition can cause excessive pressure on the high side of a self-contained recovery device?

    <p>When there is a large volume of non-condensable gas</p> Signup and view all the answers

    At what pressure must the recovery procedure begin if the system is at?

    <p>0 psig</p> Signup and view all the answers

    Which recovery equipment maintenance practice should be performed regularly?

    <p>Check recovery device for refrigerant leaks</p> Signup and view all the answers

    Study Notes

    EPA and Small Appliances

    • A small appliance is defined by the EPA as a product fully manufactured, charged, and hermetically sealed in a factory.
    • Equipment used for refrigerant recovery must adhere to strict efficiency standards, such as recovering 90% of refrigerant during operation or achieving a 4-inch vacuum as per AHRI 740.

    Approved Refrigerants

    • R-600A is an approved substitute refrigerant for new household refrigerators, while hydrocarbons are not approved for retrofit into existing appliances.
    • CFCs, HCFCs, and HFOs can only be sold to EPA-certified technicians for service or installation of refrigeration and air conditioning equipment.

    Recovery Devices

    • Recovery devices must recover at least 80% of the refrigerant with an inoperative compressor and 90% with an operative compressor.
    • Permanent safety markings on household refrigerators using HC refrigerants are not required on the exterior.

    Leak Management

    • It's recommended to repair leaks found during servicing small appliances, though not mandatory.
    • Contaminated refrigerant in a recovery cylinder should be turned in for reclamation.

    Safety and Best Practices

    • Safety practices include wearing eyewear and butyl-lined gloves when handling refrigerant hoses.
    • While using nitrogen for repairs, tanks should always be equipped with a regulator.

    Refrigerants and Environmental Impact

    • CFCs are the most harmful to stratospheric ozone and can decompose into hydrochloric and hydrofluoric acids at high temperatures.
    • Large refrigerant leaks can displace oxygen and cause suffocation due to being heavier than air.

    Certification Requirements

    • Technicians must obtain Type 1 or universal certification to recover CFCs, HCFCs, or HFCs while servicing small appliances.
    • Only one access valve is necessary for recovery from sealed systems, especially those with restricted capillary tubes.

    Recovery Techniques

    • System-dependent recovery can only occur when the compressor operates.
    • Recovering R-410A requires using a clearly marked recovery vessel to prevent mixing.

    Maintenance and Equipment Care

    • Regular maintenance of recovery equipment includes checking for refrigerant leaks.
    • Accessing both high and low sides of a system is necessary when the compressor is not running.

    Miscellaneous

    • Refrigerant vented while filling a charging cylinder must be recovered if it is a CFC, HCFC, or HFC.
    • Use of refuge or recovery devices is mandated to improve recovery speed and efficiency.

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    Test your knowledge on the EPA's definition of small appliances and approved refrigerants with these flashcards. You'll learn about essential products, substitutes, and regulations related to household refrigeration. Perfect for students or professionals in the field of environmental science.

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