Practice Test Geeks(RSES) Refrigeration Service Engineers Society Certification Practice Test
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Safety Practices & Regulatory Compliance 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.

Read the first 7 Safety Practices & Regulatory Compliance flashcards as text

  1. What does the DOT classification 'UN 1018' identify?

    Answer: Chlorodifluoromethane (R-22)

    UN 1018 is the DOT identification number for chlorodifluoromethane, commonly known as R-22, a refrigerant regulated under both DOT and EPA rules.

  2. A refrigeration system using R-717 (ammonia) requires special consideration because ammonia is classified as:

    Answer: B2L — higher toxicity, lower flammability

    Ammonia (R-717) is classified B2L under ASHRAE 34, indicating higher toxicity (B) and lower flammability with a low burning velocity (2L).

  3. Which federal agency regulates the transportation of refrigerant cylinders on public roads?

    Answer: DOT (PHMSA)

    The Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) regulates the transportation of refrigerant cylinders as hazardous materials.

  4. What action must be taken when a refrigerant cylinder's hydrostatic test date has expired?

    Answer: Remove it from service immediately and send for retesting or disposal

    DOT requires cylinders to be retested at specified intervals; an expired cylinder must be removed from service until retested, or it must be disposed of properly.

  5. What is the primary purpose of the EPA's Significant New Alternatives Policy (SNAP) program?

    Answer: To evaluate and regulate substitutes for ozone-depleting substances

    The SNAP program evaluates and lists acceptable and unacceptable substitutes for ozone-depleting substances to protect human health and the environment.

  6. When brazing refrigerant lines, what gas should be flowed through the tubing to prevent oxidation scale formation inside the lines?

    Answer: Dry nitrogen (N2)

    Dry nitrogen is purged through tubing during brazing to displace oxygen and prevent copper oxide scale from forming, which would contaminate the refrigerant system.

  7. Which of the following refrigerants is classified as a lower-flammability (A2L) refrigerant that requires special handling precautions compared to A1 refrigerants?

    Answer: R-32

    R-32 (difluoromethane) is classified A2L — mildly flammable with low burning velocity — requiring ignition source management that is unnecessary for A1 refrigerants like R-410A.