Commercial drivers and alcohol — Minnesota Permit Test
Commercial drivers and alcohol on the Minnesota permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A commercial driver loses their commercial license for at least one year on a first offense at 0.04 alcohol concentration or more in a commercial vehicle.
The threshold is half a car driver’s, and the consequence lands on their livelihood.
You will lose your commercial driver’s license for at least one year on the first offense if you: ■ Drive a commercial vehicle when your alcohol concentration is 0.04 or more.
A commercial driver whose alcohol concentration is under 0.04 but detectable is put out of service for 24 hours.
They are not charged, but they are not driving either, which is the point.
If your alcohol concentration is less than 0.04 but detectable, you will be put out of service for 24 hours.
An offense while operating a commercial vehicle placarded for hazardous materials costs the commercial license for at least three years.
A tanker in the wrong hands is a different order of risk, so the penalty triples.
If the offense occurs while you are operating a commercial motor vehicle that is placarded for hazardous materials, you will lose your commercial driver’s license for at least three years.
A second offense means the permanent loss of the commercial driver’s license.
There is no route back, which is the state deciding once was the only chance.
A second offense will result in the permanent loss of your commercial driver’s license.
On the test
How long does a first commercial alcohol offense cost the commercial license?
At least one year. The threshold is half a car driver’s, and the consequence lands on their livelihood. Minnesota Driver’s Manual, p.93: “You will lose your commercial driver’s license for at least one year on the first offense if you: ■ Drive a commercial vehicle when your alcohol concentration is 0.04 or more.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Minnesota Driver’s Manual, published by the Minnesota Department of Public Safety, and against the state code itself. Last checked 2026-09-22.
- src/assets/drivers-manuals/MN.pdf (Minnesota Driver’s Manual, May 2025, Minnesota Department of Public Safety, Driver and Vehicle Services, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MN.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json, MN entry -- the folio offset of 3 and its basis, the folio marker, the extraction-flag score and the welded compounds it costs, and the record of where the exam shape comes from