In Illinois, it is illegal to let a person you know is under the influence drive your vehicle.
- True
- False
Show the answer
True
Allowing this is an offense in its own right, even though you are not the one driving.
Illinois Alcohol & Drugs practice test
Practice blood alcohol limits, DUI rules and medication: 28 questions based on the Illinois Rules of the Road, 13 of them on Illinois's own rules.
Key Illinois facts: Alcohol & Drugs
- A driver under 21 with any trace of alcohol loses driving privileges for at least three months. Chapter 6, Driving Under the Influence: Drivers Under Age 21 (p. 52)
- A first DUI conviction under 21 means revocation for at least two years. Chapter 6, Driving Under the Influence: Drivers Under Age 21 (p. 52)
- A test showing .08 percent or more brings a six-month statutory summary suspension for a first offender. Chapter 6, Driving Under the Influence: Statutory Summary Suspension/Revocation Law (p. 49)
- Refusing a chemical test brings a one-year suspension for a first offender and three years for a second offender. Chapter 6, Driving Under the Influence: Statutory Summary Suspension/Revocation Law (p. 49)
- Driving on Illinois roads means automatically agreeing to breath, blood, urine or similar testing for impairment. Chapter 6, Driving Under the Influence: Implied Consent Law (p. 49)
Sample Alcohol & Drugs questions
What is the minimum loss of driving privileges for an Illinois driver under 21 found with any trace of alcohol?
- One week
- Thirty days
- Three months
- Five years
Show the answer
Three months
Any trace of alcohol brings a suspension of at least three months for a driver under 21.
What does the Illinois implied consent law mean?
- Police must get a court order before testing
- Passengers must take tests for the driver
- Driving there means you agree to impairment testing
- Only drivers under 21 can be tested
Show the answer
Driving there means you agree to impairment testing
When you drive on Illinois roads you automatically consent to tests such as breath, blood or urine.
Which passengers are exempt from the Illinois rule against drinking alcohol in a vehicle?
- Passengers in a pickup truck
- Passengers in a taxi
- Passengers in a limousine
- Passengers in a school bus
Show the answer
Passengers in a limousine
Illinois exempts passengers in limousines, chartered non-school buses, motor homes and mini motor homes. The driver is never exempt.
What does a first DUI conviction mean for an Illinois driver under 21?
- Revocation for at least two years
- A warning letter only
- Suspension for 30 days
- Revocation for at least ten years
Show the answer
Revocation for at least two years
Drivers under 21 face a minimum two-year revocation for a first DUI conviction.
What is the minimum revocation for an adult's first DUI conviction in Illinois?
- Three months
- Thirty days
- Five years
- One year
Show the answer
One year
A first conviction revokes driving privileges for at least one year. The minimums rise with later convictions.
Source: Illinois Rules of the Road (2026), Chapter 6, Driving Under the Influence: DUI Conviction (p. 50)
According to the Illinois handbook, what removes the effects of alcohol from your body?
- Strong coffee
- Only time
- A large meal
- A cold shower
Show the answer
Only time
Your body does not clear alcohol any faster after food, coffee or a shower.
How must cannabis be carried in a vehicle in Illinois?
- In any container, if you hold a medical card
- In a sealed, odor-proof, child-resistant container
- In a closed glove box, in any bag
- In a passenger's pocket
Show the answer
In a sealed, odor-proof, child-resistant container
This container rule applies to transport in a vehicle. Neither the driver nor passengers may use cannabis in the vehicle.
Who may use cannabis inside a moving private vehicle in Illinois?
- Passengers in the back seat
- Any medical cannabis cardholder
- Passengers aged 21 or older
- No one
Show the answer
No one
Nobody in the vehicle may use cannabis, even though adult use is otherwise legal.
A first offender's chemical test in Illinois shows a BAC of .08 percent. How long is the statutory summary suspension?
- Six months
- Ten days
- Two years
- Five years
Show the answer
Six months
The suspension lasts six months. It is separate from any penalty that follows a DUI conviction.
More Illinois practice
- Full practice testAll topics, as in the knowledge test
- Road SignsWhat signs mean and what to do when you see them86 questions, 8 on Illinois rules
- Right-of-WayWho goes first at intersections, crosswalks and roundabouts34 questions, 15 on Illinois rules
- Traffic SignalsLights, arrows and pedestrian signals31 questions, 10 on Illinois rules
- Lanes & TurnsLane markings, turns, passing and merging39 questions, 18 on Illinois rules
- Speed LimitsLimits and how to adjust your speed20 questions, 10 on Illinois rules
- ParkingCurb colors, hills and where you can't park24 questions, 10 on Illinois rules
- Safe DrivingFollowing distance, weather, night driving and sharing the road47 questions, 19 on Illinois rules
- EmergenciesBreakdowns, emergency vehicles and railroad crossings26 questions, 10 on Illinois rules
- License RulesPermits, restrictions for new drivers and points20 questions, 20 on Illinois rules
- Insurance & CollisionsRequired coverage and what to do after a crash22 questions, 9 on Illinois rules
- Phones & DistractionPhone rules and other distractions17 questions, 8 on Illinois rules
About these questions
We wrote these practice questions from the facts in the Illinois Rules of the Road (2026 (DSD A 112.47, printed July 2026) 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 Illinois Secretary of State, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.