Key Michigan facts: Alcohol & Drugs
Sample Alcohol & Drugs questions
How long is a Michigan license suspended for a first drug conviction with no prior drug violations?
30 days Three years Six months Show the answer
Six months
A first conviction means six months. One or more priors within seven years means one year.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Alcohol and drugs, pp. 14-15
How long can a first refusal of a chemical test suspend a regular Michigan license?
Five years One year 30 days Show the answer
One year
For a non-commercial driver, the sanction is one year, or two years for another refusal within seven years.
Source: Michigan Vehicle Code, MCL 257.625f
According to Michigan's driver manual, when do drivers give implied consent to a chemical test?
When they apply for or renew a license Only when signing a form at the scene Only after an arrest is made Show the answer
When they apply for or renew a license
Refusing a test brings a license suspension under the implied consent law.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Alcohol and drugs, pp. 14-15
May a passenger smoke marijuana in a vehicle's passenger area on a Michigan public road?
Yes, if a window is open Yes, if the driver does not smoke No, that is prohibited Show the answer
No, that is prohibited
The ban covers both drivers and passengers in the passenger area of a vehicle on a public way.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Alcohol and drugs, pp. 14-15
Besides the adult 0.08 limit, what higher alcohol content does Michigan's intoxicated-driving law list separately?
0.12 percent 0.17 percent 0.25 percent Show the answer
0.17 percent
The law's definition of operating while intoxicated has a separate entry for an alcohol content of 0.17 or more.
Source: Michigan Vehicle Code, MCL 257.625
How long does an impaired-driving conviction stay on a Michigan driving record?
Seven years Permanently Two years Show the answer
Permanently
Most convictions stay for at least seven years, but a conviction for impaired driving remains permanently.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Your driving record, p. 13
How much marijuana may an adult 21 or older legally transport in a vehicle in Michigan?
Up to 8 ounces Up to 2.5 ounces Up to 1 pound Show the answer
Up to 2.5 ounces
The limit is 2.5 ounces or less, and no more than 15 grams of that may be concentrate.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Alcohol and drugs, pp. 14-15
What alcohol figure does Michigan law name for 'any bodily alcohol content' in drivers under 21?
0.02 percent 0.05 percent 0.10 percent Show the answer
0.02 percent
The statute starts at 0.02. It also covers any other presence of alcohol from drinking, except as part of a religious service.
Source: Michigan Vehicle Code, MCL 257.625
How many points does refusing a chemical alcohol test add to a Michigan driving record?
Show the answer
Six
Refusal is a six-point violation, the same as operating while intoxicated.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Michigan's point system, pp. 13-14
According to Michigan's driver manual, which holds the same alcohol as a 12-ounce beer?
A 6-ounce glass of whiskey A 16-ounce glass of wine A 5-ounce glass of wine Show the answer
A 5-ounce glass of wine
A standard 12-ounce beer, 5-ounce wine and 1.5-ounce shot of whiskey each hold an equal amount of alcohol.
Source: What Every Driver Must Know (SOS-133, Rev. 10/2025), Chapter 2, Alcohol and drugs, pp. 14-15
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About these questions
We wrote these practice questions from the facts in the What Every Driver Must Know (SOS-133) (Revised October 2025 edition) and from official sources on road signs. Every answer links to its source, so you can check it and read more.
DMV Decoded is an independent guide, not a government agency. This practice test is not connected to the Michigan Department of State (Secretary of State), and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.
