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Section 609 MVAC Systems Flashcards

7 cards from real EPA 608 609 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Section 609 MVAC Systems flashcards as text

  1. Which refrigerant replaced R-12 in vehicles manufactured from the mid-1990s?

    Answer: R-134a

    R-134a (HFC-134a) replaced R-12 in MVAC systems starting in the mid-1990s.

  2. Recovery/recycling equipment for R-12 must meet which standard?

    Answer: SAE J1991

    SAE J1991 sets the standard for R-12 recovery and recycling equipment.

  3. Why must R-12 and R-134a never be mixed in the same system?

    Answer: Cross-contamination damages equipment and recycled refrigerant

    Mixing refrigerants cross-contaminates recovery equipment and ruins recycled refrigerant.

  4. What fitting design helps prevent accidental mixing of R-12 and R-134a?

    Answer: Unique quick-connect service fittings

    R-134a uses unique quick-connect fittings that differ from R-12 to prevent cross-charging.

  5. The newest low-GWP refrigerant adopted for many modern MVAC systems is:

    Answer: R-1234yf

    R-1234yf is a low-global-warming-potential refrigerant used in many newer vehicles.

  6. Compared to R-134a, R-1234yf is notable for being:

    Answer: Mildly flammable (A2L)

    R-1234yf is classified A2L, meaning it is mildly flammable, unlike R-134a.

  7. Recovery equipment for R-134a is governed by which SAE standard?

    Answer: SAE J2210

    SAE J2210 covers R-134a recovery/recycling equipment for MVAC.