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Alcohol, Drugs, and Driving — Missouri Driver's License Practice Test

Alcohol, Drugs, and DrivingQuestion 1 of 30

39 questions in this topic · 30 drawn at random this round

What are the license penalties for the first, second, and third Minor in Possession (MIP) offenses?

Missouri Driver Guide

All questions are based on the official Missouri Driver Guide (Missouri Dept. of Revenue). Study the relevant chapter to reinforce your knowledge.

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This Missouri Driver's License Alcohol, Drugs, and Driving practice set has 39 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real Missouri Driver's License knowledge test to pass.

Topic overview

This section explains how alcohol and drugs impair driving and the legal consequences of driving impaired in Missouri. It covers Blood Alcohol Content (BAC) limits, chemical testing, the difference between administrative and court-convicted penalties, and special rules for drivers under 21.

It is illegal to drive with a BAC of 0.08% or more, 0.04% or more for commercial drivers, or 0.02% or more if under 21. When a driver meets these limits (or .02% or more for minors), the officer takes the license and the license is suspended or revoked after 15 days; the notice includes a 15-day driving permit and lets you request a hearing or a 90-day Restricted Driving Privilege. Refusing a chemical test of your BAC results in your license being taken away for one year.

Two types of action can follow: administrative actions and court-convicted actions, each with different penalties. For administrative action, a first DUI offense is a license suspension and a second offense within five years is a one-year license revocation with an ignition interlock device required for reinstatement. Under Missouri's Abuse and Lose Law, a person under 21 may lose their license for 90 days for any intoxication-related offense. DWI applies to alcohol, illegal drugs, prescription and over-the-counter medication, or any combination, and the penalties are the same regardless of the substance.

What is the legal BAC limit for driving in Missouri?

It is illegal to drive with a BAC of 0.08% or more. The limit is 0.04% or more for commercial drivers and 0.02% or more if you are under 21.

What happens if I refuse the chemical test?

Refusing a chemical test of your BAC results in your license being taken away for one year. The chemical test — of breath, blood, or urine — is what measures your Blood Alcohol Content.

Do prescription or over-the-counter medicines count as impaired driving?

Yes. DWI applies to impairment by alcohol, illegal drugs, prescription medication, over-the-counter medication, or any combination, and the penalties are the same regardless of the substance. All medications can impair driving even when taken as directed, so check with your physician or pharmacist.

Written from the official Missouri Driver Guide — Alcohol, Drugs, and Driving ↗· Last checked: 2026-07-10· Reviewed by the PassPrep editorial team· How we verify →

Sample questions

Three questions from the Alcohol, Drugs, and Driving bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

What does the Missouri Driver Guide advise if you are going to drink alcohol?
- Let someone who has not been drinking drive — Correct answer
- Drive only on side streets at low speed
- Wait 15 minutes before driving
- Drink coffee to sober up before driving
Explanation: Even a small amount of alcohol may affect your driving ability, so if you are drinking you should let someone who has not been drinking drive.
Handbook: Alcohol, Drugs, and Driving — Effects of Drinking
If you injure or kill someone while driving under the influence of alcohol or drugs, what penalty may you face?
- 2 to 7 years in jail, a $5,000 fine, and loss of your license for five years — Correct answer
- Up to 30 days in jail and a $250 fine
- A one-year license suspension only
- A written warning and traffic school
Explanation: Injuring or killing someone while driving under the influence may result in 2 to 7 years in jail, a $5,000 fine, and loss of your license for five years.
Handbook: Alcohol, Drugs, and Driving — Penalties
What is the purpose of field sobriety tests such as walking heel to toe or standing on one leg?
- To help the officer decide whether to arrest you and require a chemical test — Correct answer
- To measure your exact blood alcohol content
- To test your eyesight for the vision exam
- To check your physical fitness to drive long distances
Explanation: These tests help the officer decide whether you should be arrested and required to take a chemical test.
Handbook: Alcohol, Drugs, and Driving — Field Sobriety Tests