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 purpose of a refrigerant recovery machine's high-pressure cutout switch?

    Answer: To shut down the compressor when discharge pressure becomes dangerously high

    The high-pressure cutout protects the recovery machine's compressor from damage caused by excessively high discharge pressures.

  2. Under ASHRAE Standard 15, which refrigerant safety classification indicates the lowest toxicity and flammability?

    Answer: A1

    Class A1 refrigerants have the lowest acute toxicity (Class A) and are non-flammable (Class 1), making them the safest classification.

  3. A technician is working in a confined space with a suspected refrigerant leak. What is the first action to take?

    Answer: Evacuate the space and ventilate before re-entry

    Immediate evacuation and ventilation of the confined space is required before re-entry to prevent oxygen displacement or toxic exposure.

  4. Which EPA program requires technicians who purchase refrigerants in containers larger than 2 pounds to hold a valid certification?

    Answer: EPA Section 608

    EPA Section 608 requires technicians to be certified before purchasing or handling refrigerants in containers larger than 2 pounds.

  5. What is the primary hazard associated with using nitrogen to pressure-test a refrigeration system?

    Answer: Overpressurization if pressure is not controlled

    Nitrogen is used at high pressures, and without a pressure regulator and relief valve, systems can be overpressurized, leading to catastrophic failure.

  6. What label information is required on a recovered refrigerant cylinder before it can be sent to a reclaimer?

    Answer: Refrigerant type, whether it contains oil, and whether it is mixed with other refrigerants

    Recovered refrigerant cylinders must be labeled with the refrigerant type, oil contamination status, and whether the refrigerant is a mixture.

  7. Which condition makes it legal under EPA Section 608 to vent a small amount of refrigerant during service?

    Answer: De minimis releases that occur during good-faith repair attempts

    EPA allows de minimis refrigerant releases that unavoidably occur during good-faith attempts to recover, recycle, or reclaim refrigerants.