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Core Flashcards

7 cards from real EPA 608 609 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Core flashcards as text

  1. What is the difference between 'recovery' and 'recycling' of refrigerant?

    Answer: Recovery removes refrigerant from a system; recycling cleans it by separating oil and passing through filter-driers

    Recovery is simply removing refrigerant from a system, while recycling cleans it through oil separation and filtration.

  2. What does 'reclaiming' refrigerant require that recycling does not?

    Answer: Reprocessing to meet ARI/AHRI 700 purity standards, usually at an off-site facility

    Reclaimed refrigerant must be reprocessed and laboratory-verified to meet the AHRI 700 purity standard.

  3. When recovering refrigerant from a system with a non-condensable gas problem such as air, what is the recommended approach?

    Answer: Recover the mixture and avoid releasing the non-condensables separately into the air

    Technicians should not vent non-condensables; the mixture should be handled through proper recovery and recycling equipment.

  4. Liquid recovery is generally faster than vapor recovery primarily because:

    Answer: A given volume of liquid contains far more refrigerant mass than the same volume of vapor

    Liquid is much denser than vapor, so moving liquid transfers far more refrigerant per unit volume.

  5. To speed up the recovery process from a system, a technician may do all of the following EXCEPT:

    Answer: Heat the recovery cylinder to raise its pressure above the system

    The recovery cylinder should be cooled, not heated, to maintain a pressure difference that draws refrigerant in.

  6. A 'system-dependent' (passive) recovery method may only be used on appliances containing how much refrigerant?

    Answer: 15 pounds or less

    Passive recovery is permitted only on small appliances containing 15 pounds or less of refrigerant.

  7. What is the primary risk of mixing two different refrigerants in the same recovery cylinder?

    Answer: The blend cannot be reclaimed and is typically considered contaminated waste

    Cross-contaminated refrigerant mixtures generally cannot be reclaimed and must be disposed of as hazardous waste, which is costly.