Minnesota: Alcohol and drugs — Part 1 Practice Test
Questions in this part include: “Minnesota law prohibits driving while impaired by which kind of substances?” · “What is the amount of alcohol in the blood called?”
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Questions are original and based on the official manual "Minnesota Driver’s Manual" (June 2026), Minnesota Driver and Vehicle Services.
All 17 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.
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Minnesota law prohibits driving while impaired by which kind of substances?
- Only alcohol and illegal drugs
- Only drugs that are sold without a prescription
- Only substances that are illegal to buy
- Controlled or intoxicating substances
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Correct answer: Controlled or intoxicating substances
Minnesota law prohibits driving while impaired by controlled or intoxicating substances.
Source: Minnesota Driver’s Manual (June 2026), page 91
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Which of these substances can impair driving and fall under Minnesota’s impaired-driving law?
- Only illegal drugs and alcohol
- Over-the-counter cold medicines
- Only drugs bought with a prescription
- None of these
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Correct answer: Over-the-counter cold medicines
The substances include illegal drugs, prescription drugs, over-the-counter drugs (like cold medicines) and household products.
Source: Minnesota Driver’s Manual (June 2026), page 91
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How dangerous is driving while impaired by drugs compared with driving while impaired by alcohol?
- It is as dangerous
- It is much less dangerous
- It is dangerous only at night
- It is dangerous only for new drivers
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Correct answer: It is as dangerous
The manual states that driving while impaired by drugs is as dangerous as driving while impaired by alcohol.
Source: Minnesota Driver’s Manual (June 2026), page 91
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Legal drugs that may not cause impairment alone can do what when mixed with alcohol?
- Cancel the effects of the alcohol
- Have no effect on driving
- Have powerful intoxicating effects
- Wear off within a few minutes
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Correct answer: Have powerful intoxicating effects
Legal drugs that may not cause impairment alone can have powerful intoxicating effects when mixed with alcohol.
Source: Minnesota Driver’s Manual (June 2026), page 91
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What is the safest rule about drugs and driving?
- To take drugs only in the evening
- Not to mix drugs with driving at all
- To take drugs only in half doses
- To drive only short distances after taking drugs
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Correct answer: Not to mix drugs with driving at all
The manual says the safest rule is to not mix drugs with driving at all.
Source: Minnesota Driver’s Manual (June 2026), page 91
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When is possession and use of a drug prescribed by a doctor permitted for a driver?
- If the doctor says it will not affect your ability to drive safely
- If you have used the same drug regularly for more than a year
- If the drug was prescribed by a doctor who lives in another state
- If you take the drug only on weekends and never during the work week
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Correct answer: If the doctor says it will not affect your ability to drive safely
Use of a prescribed drug is permitted if the doctor informs the driver that it will not affect their ability to drive safely.
Source: Minnesota Driver’s Manual (June 2026), page 91
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What is the only cure for fatigue?
- Coffee
- A cold shower
- A stimulant drug
- Rest
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Correct answer: Rest
The manual says not to use any drug to hide fatigue, because the only cure for fatigue is rest.
Source: Minnesota Driver’s Manual (June 2026), page 91
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Alcohol is classified as what kind of substance?
- A stimulant that speeds up body functions
- A depressant that slows body functions
- A vitamin that helps motor skills
- A drug that has no effect on motor skills
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Correct answer: A depressant that slows body functions
Alcohol is a depressant that slows body functions and impairs motor skills.
Source: Minnesota Driver’s Manual (June 2026), page 91
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What is the amount of alcohol in the blood called?
- Alcohol concentration
- Alcohol proof
- Alcohol level of oxidation
- Alcohol rate of elimination
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Correct answer: Alcohol concentration
The amount of alcohol in the blood is called the alcohol concentration.
Source: Minnesota Driver’s Manual (June 2026), page 91
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When does your driving ability become impaired by alcohol?
- After two drinks
- After three drinks
- After just one drink
- Only after you feel dizzy
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Correct answer: After just one drink
The manual states that your driving ability becomes impaired after just one drink.
Source: Minnesota Driver’s Manual (June 2026), page 91
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How does a higher alcohol concentration affect a driver?
- It means a smaller degree of impairment
- It has no relation to impairment
- It only affects hearing
- It means a greater degree of impairment
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Correct answer: It means a greater degree of impairment
A higher alcohol concentration means a greater degree of impairment.
Source: Minnesota Driver’s Manual (June 2026), page 91
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How does alcohol affect your judgment of your own impairment?
- You judge your impairment more strictly
- You misjudge your degree of impairment
- You judge your impairment correctly
- You notice impairment before others do
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Correct answer: You misjudge your degree of impairment
When you consume alcohol, you misjudge your degree of impairment, so you may drive too fast or fail to wear a seat belt.
Source: Minnesota Driver’s Manual (June 2026), page 91
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How does alcohol affect vision?
- It widens peripheral vision and improves night vision
- It improves color recognition at night
- It increases the speed of eye movement
- It reduces eye movement and decreases peripheral vision
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Correct answer: It reduces eye movement and decreases peripheral vision
Alcohol reduces the range of eye movement, which decreases peripheral vision.
Source: Minnesota Driver’s Manual (June 2026), page 91
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How does alcohol affect reaction time?
- It slows reaction time
- It speeds up reaction time
- It has no effect on reaction time
- It speeds up reaction time at night only
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Correct answer: It slows reaction time
Alcohol slows reaction time, so impaired drivers cannot respond quickly to traffic signals, other drivers and pedestrians.
Source: Minnesota Driver’s Manual (June 2026), page 92
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Impaired drivers tend to do what with the steering wheel?
- Under-steer, which can result in driving much too slowly
- Hold the wheel loosely with only one hand at all times
- Over-steer, which can result in weaving or leaving the road
- Steer more smoothly and gently than sober drivers do
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Correct answer: Over-steer, which can result in weaving or leaving the road
Impaired drivers tend to over-steer, which can result in weaving and running off the road.
Source: Minnesota Driver’s Manual (June 2026), page 92
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How does alcohol affect a driver’s perception?
- They notice more sounds and sights than sober drivers do
- They notice only sounds and ignore everything they see
- They notice only moving objects and ignore all signs
- They do not notice or correctly interpret sounds and sights
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Correct answer: They do not notice or correctly interpret sounds and sights
Impaired drivers do not notice or correctly interpret sounds and sights.
Source: Minnesota Driver’s Manual (June 2026), page 92
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What does alcohol impair in terms of coordination and balance?
- The ability to combine steadiness with speed and accuracy
- The ability to hear low-pitched sounds from other vehicles
- The ability to read signs that are printed in small letters
- The ability to count backward from 100 while driving
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Correct answer: The ability to combine steadiness with speed and accuracy
Alcohol impairs the ability to combine steadiness with speed and accuracy.
Source: Minnesota Driver’s Manual (June 2026), page 92