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Safety Practices Flashcards

7 cards from real HVAC 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 flashcards as text

  1. When working with refrigerants, which type of gloves should HVAC technicians wear to prevent frostbite?

    Answer: Cryogenic or chemical-resistant gloves

    Cryogenic or chemical-resistant gloves protect against refrigerant contact, which can cause severe frostbite at extremely low temperatures.

  2. What is the minimum safe distance a technician should maintain from an electrical panel before beginning work on an HVAC system connected to it?

    Answer: Follow NFPA 70E arc flash boundary requirements based on voltage

    NFPA 70E establishes arc flash protection boundaries that vary based on system voltage and available fault current.

  3. Which color label on a refrigerant cylinder indicates it contains a blend/mixed refrigerant?

    Answer: A solid color assigned to that specific blend

    ARI/AHRI assigns specific colors to individual refrigerants and blends, so each refrigerant type has its own designated cylinder color.

  4. A technician is about to braze copper refrigerant lines in a confined mechanical room. What is the MOST critical safety precaution?

    Answer: Provide adequate ventilation and have a fire extinguisher ready

    Brazing produces toxic fumes and open flame, requiring adequate ventilation and a fire extinguisher immediately accessible.

  5. What does OSHA require when an HVAC technician must work on a rooftop unit within 6 feet of an unguarded roof edge?

    Answer: Fall protection such as guardrails, safety nets, or personal fall arrest systems

    OSHA 29 CFR 1926.502 requires fall protection (guardrails, safety nets, or personal fall arrest) when within 6 feet of an unprotected edge.

  6. When recovering refrigerant from a system suspected to contain moisture contamination, what additional hazard must the technician consider?

    Answer: Acid formation that can damage the recovery machine and harm the technician

    Moisture reacts with refrigerant to form hydrofluoric or hydrochloric acid, which can damage equipment and pose a chemical burn hazard.

  7. An HVAC technician smells a strong odor of rotten eggs near a gas furnace. What is the FIRST action to take?

    Answer: Evacuate and call the gas utility — do not operate any electrical switches

    The rotten egg smell indicates a gas leak; evacuating immediately and calling the gas utility prevents ignition — electrical switches can spark and trigger an explosion.