Practice Test Geeks(RSES) Refrigeration Service Engineers Society Certification Practice Test
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Refrigerant Management Flashcards

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

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  1. What is the primary purpose of adding a desiccant dryer to a refrigeration system?

    Answer: To remove moisture from the refrigerant circuit

    Desiccant dryers (filter-driers) absorb moisture from the refrigerant to prevent ice formation at the expansion device and acid formation in the system.

  2. Which refrigerant was the primary replacement for R-12 in automotive air conditioning systems?

    Answer: R-134a

    R-134a replaced R-12 in automotive AC systems beginning in 1994 model year vehicles because it has zero ozone depletion potential.

  3. Non-condensable gases trapped in a refrigeration system will cause which of the following symptoms?

    Answer: Higher than normal discharge pressure

    Non-condensable gases (such as air or nitrogen) accumulate in the condenser and raise the discharge pressure above what the refrigerant saturation pressure would be at the condenser temperature.

  4. Under the Montreal Protocol's Kigali Amendment, HFC refrigerants are being phased down primarily because of their contribution to which environmental problem?

    Answer: Global warming / climate change

    The Kigali Amendment targets HFCs due to their high global warming potential (GWP), as they do not deplete ozone but are potent greenhouse gases.

  5. A technician discovers that a system's refrigerant has been contaminated with the wrong type of refrigerant. What is the correct procedure?

    Answer: Recover the entire charge and send to a reclaimer, then recharge with virgin refrigerant

    Contaminated refrigerant must be fully recovered and sent to a certified reclamation facility; the system should then be recharged with verified virgin or reclaimed refrigerant.

  6. What is the GWP (Global Warming Potential) of R-22 relative to CO₂?

    Answer: Approximately 1,810

    R-22 has a GWP of approximately 1,810, meaning one pound of R-22 has the same greenhouse warming impact as 1,810 pounds of CO₂ over 100 years.

  7. Which type of refrigerant cylinder is used exclusively for shipping and cannot be refilled with refrigerant for resale?

    Answer: Disposable/non-refillable cylinder

    Disposable (non-refillable) cylinders are single-use shipping containers; refilling them with refrigerant for resale is illegal under EPA and DOT regulations.