Illinois Car / Permit practice
Illinois Car / Permit: Alcohol & Drugs practice test
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Content reviewed against official driver handbooks · August 12, 2026
13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
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12 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. What does Illinois law say about open alcohol containers in a vehicle?
Correct answer: Alcohol may not be in the passenger area if the container has been opened
It is illegal to drink in a vehicle, and an opened alcohol container may not be kept in the passenger area.
Source: Illinois Rules of the Road — Illegal Transportation of Alcoholic Beverages/Open Container
2. It is illegal to drive in Illinois with a THC (cannabis) level of at least how much in whole blood?
Correct answer: 5 nanograms per milliliter
It is unlawful to drive with 5 or more nanograms of THC in each milliliter of whole blood, or 10 or more nanograms per milliliter of another bodily substance.
Source: Illinois Rules of the Road — Blood-Alcohol Concentration (BAC)/Presence of Drugs
3. Under Illinois' implied consent law, driving on public roads means you have agreed to what?
Correct answer: Submit to chemical testing for alcohol or drugs when lawfully requested
By driving in Illinois you automatically consent to breath, blood, urine, or other testing to determine impairment; refusal brings a suspension.
4. Which situation can trigger enhanced DUI penalties in Illinois?
Correct answer: A BAC of .16% or more, or transporting a child under 16
A BAC of .16% or higher, or driving under the influence with a child under 16 in the vehicle, can lead to enhanced penalties.
5. A driver under 21 who is convicted of DUI faces what minimum penalty for a first offense?
Correct answer: A revocation of at least two years
For a driver under 21, a first DUI offense that ends in conviction takes away driving privileges for no less than two years.
6. For a first offender, refusing a chemical test after a DUI arrest results in what suspension?
Correct answer: A one-year suspension of driving privileges
A first-time refusal of chemical testing brings a statutory summary suspension of one year, longer than the suspension for failing the test.
Source: Illinois Rules of the Road — Statutory Summary Suspension/Revocation Law
7. In Illinois it is illegal to drive with a blood-alcohol concentration at or above what level?
Correct answer: .08%
Driving with a BAC of .08% or higher is illegal, though you can still be convicted at a lower level if your driving is impaired.
Source: Illinois Rules of the Road — Blood-Alcohol Concentration (BAC)
8. A first DUI conviction in Illinois carries what minimum penalty?
Correct answer: At least a one-year revocation of driving privileges
A first DUI conviction results in revocation of driving privileges for a minimum of one year, on top of any statutory summary suspension.
9. For a first offender, failing a chemical test (BAC .08% or more) leads to what suspension?
Correct answer: Six months
A first offender who fails chemical testing faces a six-month statutory summary suspension.
Source: Illinois Rules of the Road — Statutory Summary Suspension/Revocation Law
10. A driver under 21 found with any trace of alcohol faces what consequence?
Correct answer: At least a three-month suspension of driving privileges
Illinois has a zero-tolerance rule: a driver younger than 21 with any detectable alcohol loses driving privileges for at least three months.
11. How must cannabis be carried in a vehicle in Illinois?
Correct answer: In a sealed, odor-proof, child-resistant container
Cannabis may only be transported in a sealed, odor-proof, child-resistant container, and no one in the vehicle may use it.
Source: Illinois Rules of the Road — Medical and Recreational Cannabis
12. What is the only reliable way to lower your blood-alcohol level after drinking?
Correct answer: Allowing enough time to pass
Only time removes alcohol from your system; coffee, food, and showers do not speed up the process.
Source: Illinois Rules of the Road — Blood-Alcohol Concentration (BAC)
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Every Illinois question is written from the official Illinois driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free