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EPA 609 MVAC System Components & Operation 5

In a typical R-134a orifice tube system, where is the fixed orifice tube usually found?

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. epa.gov — Eligibility · verified Oct 2026
  2. macsmobileairclimate.org — Retake fee, score release, score validity, test delivery, exam format, passing score · verified Oct 2026
  3. ase.com — Test delivery, fees, exam format, passing score, score release · verified Oct 2026