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Minnesota Air Brakes Test

You’ll face real air brake questions that cover ice‑packed I‑94 in January—prepare here.

118

Questions

80%

To Pass

Minutes

118 questions · 30 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Minnesota CDL handbook and FMCSA regulations.

About the Minnesota Air Brakes Test

Air brakes work differently in Minnesota’s brutal winters. Cold air contracts, moisture freezes, and slack adjusters get stiff. You must know how to inspect your system before every trip—especially when temps drop below zero.

Picture yourself rolling down I‑94 near St. Cloud with a full load of grain. A car cuts you off. Your reaction time shrinks because of ice on the road. That’s why brake lag matters more here than in warmer states. We built this test to match the Minnesota CDL manual exactly.

Our 25 questions cover pre‑trip inspections, system components, and emergency procedures. Each question comes straight from the Minnesota Department of Public Safety’s guidelines. You’ll see scenarios about logging trucks on Highway 169 and refrigerated trailers in Duluth.

Take the practice test now. No sign‑up required. You’ll see your score instantly and get explanations for every answer.

Topics Covered

✓Brake lag – crucial on Minnesota’s icy highways

✓Slack adjuster inspection – fails more often in cold weather

✓Air compressor cut‑in/cut‑out – affects winter braking performance

✓Spring brake parking – don’t let them freeze in sub‑zero temps

✓Low air warning devices – could save you on a rural road near Thief River Falls

✓Anti‑lock brake systems – standard on newer rigs, but you still need manual skills

Study Tips

Read the air brake section of the Minnesota CDL handbook cover to cover. Pay extra attention to the winter maintenance table on page 34. It lists daily steps for sub‑freezing temps.

Practice the pre‑trip inspection out loud. In Minnesota, you’ll demonstrate it to a tester. Don’t skip the gladhands or the air dryer.

Take our practice test until you score 90% or better. The real exam adds pressure—build your confidence here first.

Minnesota Specific Information

You can take your air brake skills test at any Minnesota DVS exam station. Appointments are required. Walk‑ins aren’t allowed. Schedule online or call 651‑296‑1234.

The cost for the air brake endorsement knowledge test is $10. The skills test fee is $50. Both are payable by credit card or cash at the exam station.

Bring your commercial learner’s permit (CLP) and a vehicle with fully functional air brakes. The tester will check your vehicle’s condition before you start. No vehicle? Some exam stations rent one.

Frequently Asked Questions

Do I need a separate air brake endorsement in Minnesota?

Yes. You need an L or Z endorsement on your CDL. The air brake knowledge test covers the L endorsement. The skills test covers the Z endorsement.

What happens if my air brakes fail during the Minnesota skills test?

The test stops immediately. You must repair the vehicle and reschedule. You won’t get a refund, but you can retake the skills test after 7 days.

Can I use a simulator for the air brake test in Minnesota?

No. Minnesota DVS requires a real vehicle with air brakes for the skills test. No simulators accepted.

How do I find a nearby DVS exam station that offers air brake tests?

Use the DVS office locator on the Minnesota DPS website. Filter by CDL testing. Most larger offices like St. Paul, Rochester, and Duluth offer air brake tests.

What’s the passing score for the Minnesota air brake knowledge test?

You need 80%. That’s 20 out of 25 questions correct. Our practice test uses the same passing score.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content