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. Under EPA Section 608, which refrigerants are classified as Class I ozone-depleting substances?

    Answer: R-11, R-12, and R-113

    Class I ODS include CFCs such as R-11, R-12, and R-113, which have the highest ozone depletion potential.

  2. What is the maximum allowable leak rate for comfort cooling equipment containing more than 50 pounds of refrigerant before repair is required?

    Answer: 15% per year

    EPA regulations require repair when leak rates exceed 15% of the system charge per year for comfort cooling appliances.

  3. Which PPE is most critical when handling liquid refrigerant to prevent cryogenic burns?

    Answer: Insulated cryogenic gloves and face shield

    Cryogenic gloves and a face shield protect against liquid refrigerant contact, which can cause severe frostbite-like burns.

  4. A technician discovers a system leaking R-22 at a rate of 25% per year. What is the required response timeline under EPA regulations?

    Answer: Repair within 60 days of discovery

    EPA Section 608 requires that leaking systems exceeding threshold rates be repaired within 30 days, with a possible 60-day extension for complex repairs.

  5. What does the OSHA permissible exposure limit (PEL) for ammonia (R-717) in the workplace?

    Answer: 50 ppm TWA

    OSHA sets the PEL for ammonia at 50 ppm as an 8-hour time-weighted average.

  6. Which document must accompany a refrigerant cylinder when it is transported by a commercial vehicle?

    Answer: DOT shipping papers

    DOT requires shipping papers (hazardous materials shipping papers) to accompany regulated refrigerant cylinders during transport.

  7. When evacuating a refrigeration system before opening it for service, what is the primary environmental reason for doing so?

    Answer: To prevent refrigerant release into the atmosphere

    Evacuation captures refrigerant to prevent its venting to the atmosphere, which is required by EPA Section 608 to protect the ozone layer and climate.