Michigan LARA license exam · given by PSI
Refrigeration practice test
Practice for the Michigan Refrigeration mechanical contractor exam: the refrigeration cycle, refrigerant safety and classes, code requirements for machinery rooms, walk-ins, and refrigerant piping. (73 questions total: 10 free + 63 in the paid pass.)
Exam format from the PSI candidate bulletin. Exam fee: $50.
Practice the Refrigeration exam
Topic drills (pass required)
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Review status: pending licensed mechanical contractor review. These are original questions written to the PSI content outline and referenced to the Michigan mechanical code and LARA’s reference list. Calculations were checked by script, but no licensed mechanical contractor has reviewed them yet, so we don’t claim they are expert-reviewed. Spot an error? Use “Report this question” on any item.
What’s on the exam
| Topic | Our estimated weight | In our mock | Bank |
|---|---|---|---|
Michigan law (PA 407 Article 8, PA 230)
| 9% | 5 | 7 |
Refrigeration cycle and principles
| 18% | 10 | 13 |
Refrigerants, ASHRAE 34, and EPA Section 608
| 18% | 10 | 13 |
Mechanical code Chapter 11 and ASHRAE 15
| 18% | 10 | 13 |
Commercial walk-ins, components, and troubleshooting
| 18% | 10 | 13 |
Piping, brazing, evacuation, and charging
| 19% | 10 | 14 |
About the weights: PSI doesn’t publish topic weights. These are our estimate.
Test-day facts
- Computer-based at PSI test centers, after LARA approves your application.
- Open book: bring unmarked, bound copies of the references LARA lists for this classification.
- Questions on PA 407 (the Skilled Trades Regulation Act) and PA 230 appear on every classification exam.
Sources: PSI Candidate Information Bulletin 5421 (mechanical, effective Aug 20, 2026) · LARA mechanical exam reference materials (PDF). Checked October 30, 2026. Rules and fees change, so confirm with LARA and PSI before you apply.
Refrigeration exam FAQ
How many questions are on the Refrigeration exam?
PSI’s bulletin lists 55 questions in 60 minutes, open book, with 75% to pass.
What does it cost?
PSI lists $50.
Are these the real exam questions?
No. MI Trade Prep questions are original practice items written to PSI’s published content outline. They are not actual exam questions, and MI Trade Prep is not affiliated with LARA or PSI.
Study guide: Michigan Refrigeration exam guide