Automotive refrigerant systems, climate controls, leak testing and recovery.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the most common refrigerant currently used in most automotive A/C systems?
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R-134a (hydrofluoroalkane)- What is the recovery refrigerant mandated for newer vehicles starting around 2017?
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R-1234yf (hydrofluoroolefin, HFO)- At what temperature does R-134a boil at atmospheric pressure?
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Approximately -26°C (-15°F)- What is the critical pressure of R-134a above which it cannot be liquefied?
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Approximately 4,060 kPa (590 psi)- What color identifies an R-134a refrigerant tank?
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Light blue- What component separates liquid and vapor refrigerant on the receiver side?
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Receiver-drier or desiccant cartridge- What component controls the flow of liquid refrigerant into the evaporator?
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Thermal expansion valve (TXV) or orifice tube- Where is the A/C compressor typically located?
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On the engine, belt-driven by a serpentine or drive belt- What is the function of the condenser in an A/C system?
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To cool and condense high-pressure refrigerant vapor into liquid form- What is the function of the evaporator in an A/C system?
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To absorb heat from cabin air, causing refrigerant to evaporate- What removes moisture and acid from the refrigerant system?
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Desiccant or drying agent cartridge- Where is an accumulator typically located in an A/C system?
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On the suction side of the compressor, after the evaporator- What is the difference between a receiver-drier and an accumulator?
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Receiver-drier is used in expansion-valve systems, accumulator in orifice-tube systems- What is superheating in an A/C system?
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The temperature rise of refrigerant vapor above its saturation temperature- What is subcooling in an A/C system?
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The temperature drop of liquid refrigerant below its saturation temperature
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