Practice Test Geeks(CRST) Certified Refrigeration Service Technician Practice Test
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Safety Procedures & Environmental Regulations Flashcards

7 cards from real CRST 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 Procedures & Environmental Regulations flashcards as text

  1. What is the primary purpose of the Montreal Protocol as it relates to refrigeration technicians?

    Answer: Phase out ozone-depleting substances globally

    The Montreal Protocol is an international treaty that established schedules for phasing out ozone-depleting substances, including CFC and HCFC refrigerants.

  2. When should a technician use a self-contained breathing apparatus (SCBA) rather than a supplied-air respirator during refrigerant work?

    Answer: In immediately dangerous to life or health (IDLH) atmospheres

    SCBA is required in IDLH atmospheres where immediate danger exists, as it provides a self-contained air supply independent of the surrounding environment.

  3. Which type of fire extinguisher is appropriate for an electrical fire involving a refrigeration control panel?

    Answer: Class C (CO2 or dry chemical)

    Class C extinguishers are rated for electrical fires and use non-conductive agents like CO2 or dry chemical that won't create electrocution hazards.

  4. What is the correct procedure for disposing of a refrigerant cylinder that has been emptied to EPA standards?

    Answer: Return it to the refrigerant supplier for reuse or disposal

    Empty cylinders should be returned to the supplier, as they may contain residual refrigerant and are subject to DOT regulations even when emptied.

  5. A technician discovers an unknown refrigerant in a system. Why is mixing it with a known refrigerant in a recovery cylinder prohibited?

    Answer: Mixed refrigerants cannot be reclaimed and must be destroyed

    Reclaimers cannot process contaminated or mixed refrigerants, so blended unknown refrigerants must be destroyed rather than reclaimed.

  6. Under the GWP-based regulations in the AIM Act, which action is required for high-GWP HFCs in certain equipment sectors?

    Answer: Phased reduction in production and use

    The AIM Act authorizes EPA to phase down HFC production and use through an allowance system, targeting high-GWP refrigerants across equipment sectors.

  7. What is the minimum vacuum level (in microns) required before charging most commercial refrigeration systems to ensure proper moisture removal?

    Answer: 500 microns

    Most manufacturers and industry standards require evacuation to 500 microns or lower to ensure adequate moisture removal before charging.