Practice question

A school bus A/C system uses R-134a. Which refrigerant identifier and service practice applies?

  1. R-134a is a non-flammable HFC requiring SAE J2788 recovery/recycling equipment
  2. R-134a is a flammable HFO requiring spark-proof tools only
  3. R-134a is the same as R-12 and uses mineral oil
  4. R-134a requires no recovery because it is environmentally inert

Answer: A — R-134a is a non-flammable HFC requiring SAE J2788 recovery/recycling equipment

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