Illinois: Alcohol & drugs — Part 1 Practice Test
Questions in this part include: “According to the Illinois manual, what is the number one killer on American roadways?” · “It is illegal to drive in Illinois with a THC concentration of how much or more per milliliter of whole blood?”
Independent educational site · not affiliated with any government agency or DMV
Ready? Test yourself
- Instant feedback with an explanation
- Every answer cites its source in the manual
- Your best score is saved on this device
Questions are original and based on the official manual "Illinois Rules of the Road" (2026), Illinois Secretary of State.
All 20 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
Show the questions and answersHide the questions
-
A driver under 18 who receives court supervision for certain alcohol-related violations will be denied a full graduated driver's license for how long?
- Six months
- 12 months
- Nine months
- Three months
Show answer
Correct answer: Nine months
Court supervision for certain alcohol-related violations means a driver under 18 is denied a full graduated license for nine months.
Source: Illinois Rules of the Road (2026), page 19
-
A person under 21 receives court supervision for possessing alcohol while an occupant of a motor vehicle. How long is the driver's license suspension?
- Six months
- Three months
- One month
- 12 months
Show answer
Correct answer: Three months
Court supervision for possession, consumption, purchase or receipt of alcohol while in a vehicle brings a three-month suspension.
Source: Illinois Rules of the Road (2026), page 20
-
A person under 21 is convicted of consuming alcohol while an occupant of a motor vehicle. What is the minimum suspension of driving privileges?
- Three months
- 12 months
- 30 days
- Six months
Show answer
Correct answer: Six months
A conviction brings a minimum six-month suspension when the offense occurred while the person was an occupant of a motor vehicle.
Source: Illinois Rules of the Road (2026), page 20
-
According to the Illinois manual, what is the number one killer on American roadways?
- Speeding
- Alcohol
- Distracted driving
- Bad weather
Show answer
Correct answer: Alcohol
The manual states that alcohol is the number one killer on American roadways.
Source: Illinois Rules of the Road (2026), page 48
-
How does alcohol affect a driver's ability to handle an emergency?
- It sharpens focus for a short time
- It only affects drivers over the legal limit
- It affects vision and slows reaction time
- It has no effect in small amounts
Show answer
Correct answer: It affects vision and slows reaction time
Alcohol affects your vision and slows your reaction time, so it takes longer to act in an emergency.
Source: Illinois Rules of the Road (2026), page 48
-
Does alcohol affect your driving if your BAC is below the level of illegal intoxication?
- No, only above .08%
- Only for drivers under 21
- Only if you also took drugs
- Yes, it still affects driving
Show answer
Correct answer: Yes, it still affects driving
Alcohol affects your driving even if you are below the level of illegal intoxication; even a small amount increases the chances of causing a crash.
Source: Illinois Rules of the Road (2026), page 48
-
At what blood-alcohol concentration (BAC) is it illegal to drive in Illinois?
- .08% or more
- .10% or more
- .05% or more
- .16% or more
Show answer
Correct answer: .08% or more
It is illegal to drive if your BAC is .08% or more.
Source: Illinois Rules of the Road (2026), page 48
-
Can you be convicted of DUI if your BAC is below .08%?
- No, never below .08%
- Yes, if your driving ability is impaired
- Only if you are a commercial driver
- Only if you caused a fatal crash
Show answer
Correct answer: Yes, if your driving ability is impaired
You can be convicted of DUI if your BAC is less than .08% but your driving ability is impaired.
Source: Illinois Rules of the Road (2026), page 48
-
What is the only way to remove the effects of alcohol from your body?
- Drinking black coffee
- Taking a cold shower
- Eating a large meal
- Time
Show answer
Correct answer: Time
Time is the only way to remove the effects of alcohol; food, coffee, and showers do not speed up its elimination.
Source: Illinois Rules of the Road (2026), page 48
-
Which of these can affect your reaction to alcohol, according to the manual?
- The food you have recently eaten
- The color of the drink you have
- The time of day that you drink
- The brand name of the drink
Show answer
Correct answer: The food you have recently eaten
Other factors that affect your reaction to alcohol include the food you have recently eaten, your tolerance of alcohol, and any drugs you may have consumed.
Source: Illinois Rules of the Road (2026), page 48
-
It is illegal to drive in Illinois with a THC concentration of how much or more per milliliter of whole blood?
- 2 nanograms
- 10 nanograms
- 5 nanograms
- 15 nanograms
Show answer
Correct answer: 5 nanograms
It is illegal to drive with a THC concentration of 5 nanograms or more per milliliter of whole blood, or 10 nanograms or more per milliliter of other bodily substance.
Source: Illinois Rules of the Road (2026), page 48
-
It is illegal to drive in Illinois with a THC concentration of how much or more per milliliter of a bodily substance other than whole blood?
- 5 nanograms
- 10 nanograms
- 20 nanograms
- 50 nanograms
Show answer
Correct answer: 10 nanograms
The limit is 10 nanograms or more per milliliter of other bodily substance (5 nanograms per milliliter of whole blood).
Source: Illinois Rules of the Road (2026), page 48
-
How much of a controlled drug, substance, or intoxicating compound in the blood makes it illegal to drive in Illinois?
- Any trace
- Only an amount above the legal limit
- Only an amount that causes a crash
- Only an amount found in a urine test
Show answer
Correct answer: Any trace
It is illegal to operate a motor vehicle on Illinois highways with any trace of a controlled drug, substance, or intoxicating compound in the blood.
Source: Illinois Rules of the Road (2026), page 48
-
Illinois law allows medical and recreational cannabis use for persons of what age?
- 18 and older
- 19 and older
- 25 and older
- 21 and older
Show answer
Correct answer: 21 and older
Illinois law allows for the medical and recreational use of cannabis for persons ages 21 and older.
Source: Illinois Rules of the Road (2026), page 48
-
Which agency administers the Compassionate Use of Medical Cannabis Program?
- The Illinois State Police department
- The Secretary of State
- The Illinois Department of Public Health
- The Illinois Department of Transportation
Show answer
Correct answer: The Illinois Department of Public Health
The program is administered by the Illinois Department of Public Health, which issues a registry ID card; a notation is made on the registrant's driving record.
Source: Illinois Rules of the Road (2026), page 48
-
How may cannabis be transported in a vehicle in Illinois?
- In any closed bag in the passenger area
- Sealed, odor-proof, child-resistant container
- Anywhere, if the driver is 21 or older
- Only in the glove compartment, unlocked
Show answer
Correct answer: Sealed, odor-proof, child-resistant container
Cannabis may only be transported in a vehicle in a sealed, odor-proof, and child-resistant container.
Source: Illinois Rules of the Road (2026), page 48
-
Who may use cannabis inside a motor vehicle in Illinois?
- Passengers who are 21 or older
- Medical cannabis card holders
- Anyone, if the vehicle is parked
- No driver or passenger
Show answer
Correct answer: No driver or passenger
No driver or passenger may use cannabis in a motor vehicle.
Source: Illinois Rules of the Road (2026), page 48
-
A police officer with reasonable suspicion of cannabis impairment asks you to take field sobriety tests. What happens if you refuse?
- Your driver's license will be suspended
- Nothing, since the tests are voluntary
- You receive only a written warning
- You must take a new driving exam
Show answer
Correct answer: Your driver's license will be suspended
Refusal to submit to testing or failure of field sobriety tests and/or validated roadside chemical tests will result in the suspension of the person's driver's license.
Source: Illinois Rules of the Road (2026), page 48
-
A medical cannabis registry card holder drives while impaired by cannabis. For how long may their medical cannabis card be revoked?
- Six months
- One year
- Five years
- Two years
Show answer
Correct answer: Two years
Driving while impaired by cannabis or illegally transporting it may result in loss of driving privileges and, for a medical cannabis registry card holder, revocation of the card for two years.
Source: Illinois Rules of the Road (2026), page 48
-
Besides alcohol and cannabis, which drugs does the manual say can impair safe driving?
- Only illegal street drugs
- Many prescription and nonprescription drugs
- Only drugs taken together with alcohol
- Only drugs without a doctor's approval
Show answer
Correct answer: Many prescription and nonprescription drugs
In addition to alcohol and cannabis, many prescription and nonprescription drugs impair safe driving, including antihistamines, cold remedies, and pain relievers.
Source: Illinois Rules of the Road (2026), page 49