Practice question

R-1234yf is increasingly used in newer vehicles. Compared with R-134a it is:

  1. A mildly flammable HFO with a much lower global warming potential
  2. A non-flammable CFC banned for mobile A/C
  3. Identical in pressure and oil to R-12
  4. Charged by sight glass only

Answer: A — A mildly flammable HFO with a much lower global warming potential

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