Michigan LARA license exam · given by PSI
HVAC Equipment practice test
Practice for the Michigan HVAC Equipment mechanical contractor exam. PSI says this exam includes ductwork and gas piping, so our bank adds the ductwork topics to heating, cooling, combustion air, fuel gas, heat pumps, and ventilation. (188 questions total: 10 free + 178 in the paid pass.)
Exam format from the PSI candidate bulletin. Exam fee: $100.
Practice the HVAC Equipment exam
Topic drills (pass required)
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Refunds: within 7 days of purchase, if you haven’t finished a full mock exam and have seen fewer than 10% of the paid questions. Try the free 10-question sample before you buy. Refund policy
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)
| 6% | 9 | 12 |
HVAC principles and load calculation
| 12% | 18 | 22 |
Equipment installation, access, and clearances
| 12% | 18 | 22 |
Combustion air and venting
| 12% | 18 | 22 |
Fuel gas piping (incl. CSST)
| 12% | 18 | 22 |
Heat pumps, refrigerant handling, and condensate
| 8% | 12 | 14 |
Ventilation and exhaust rates
| 5% | 8 | 10 |
Ductwork: construction and materials (ductwork)
| 7% | 11 | 13 |
Ductwork: installation, support, sealing, insulation (ductwork)
| 6% | 9 | 10 |
Ductwork: design and sizing (ductwork)
| 6% | 9 | 11 |
Ductwork: plenums, dampers, smoke detection (ductwork)
| 5% | 7 | 10 |
Ductwork: exhaust systems (ductwork)
| 5% | 7 | 11 |
Ductwork: chimneys and vents (ductwork)
| 4% | 6 | 9 |
About the weights: PSI doesn’t publish topic weights. These are our estimate. Ductwork topics are shared with our Ductwork bank.
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.
HVAC Equipment exam FAQ
How many questions are on the HVAC Equipment exam?
PSI’s bulletin lists 150 questions in 180 minutes, open book, with 75% to pass.
Does HVAC Equipment include ductwork?
Yes. PSI lists it as “HVAC Equipment (includes ductwork and gas piping).”
What does it cost?
PSI lists $100 for HVAC Equipment.
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 HVAC Equipment exam guide