MO DMV Alcohol and Drug Impairment Laws 2 — Questions and Answers
Question 1: In Missouri, what is the legal blood alcohol concentration (BAC) limit for drivers under 21 years old?
- 0.02% (Correct answer)
- 0.08%
- 0.04%
- 0.00%
Correct answer: 0.02%
Missouri's Zero Tolerance law sets the BAC limit at 0.02% for drivers under 21.
Question 2: Under Missouri's Abuse and Lose law, what happens to a driver under 21 convicted of possessing alcohol while driving?
- Their driving privilege is suspended for 90 days on a first offense (Correct answer)
- They receive only a written warning
- They must pay a fine but keep their license
- Their vehicle is permanently impounded
Correct answer: Their driving privilege is suspended for 90 days on a first offense
The Abuse and Lose law imposes a 90-day license suspension for a first alcohol-related offense by a minor.
Question 3: How long is the license revocation for a Missouri driver who refuses a chemical test under the Implied Consent law?
- One year (Correct answer)
- 30 days
- Six months
- Five years
Correct answer: One year
Refusing a chemical test in Missouri results in a one-year license revocation.
Question 4: A driver takes prescription medication that causes drowsiness and then drives. Under Missouri law, this driver:
- Can be arrested for driving while intoxicated (Correct answer)
- Cannot be charged because the drug is legal
- Is only liable if involved in a crash
- Is exempt if a doctor prescribed the medication
Correct answer: Can be arrested for driving while intoxicated
Missouri's DWI law applies to impairment from any drug, including legally prescribed medication.
Question 5: What is the administrative license suspension for a first-time alcohol offense (BAC of 0.08% or higher) in Missouri?
- 90 days (Correct answer)
- One year
- 30 days
- Two years
Correct answer: 90 days
A first alcohol offense brings a 90-day administrative suspension, often with restricted driving privileges available.
Question 6: Which of the following best describes how alcohol affects driving ability?
- It slows reaction time and impairs judgment (Correct answer)
- It only affects vision, not judgment
- It improves confidence and therefore driving skill
- It has no effect until BAC reaches 0.08%
Correct answer: It slows reaction time and impairs judgment
Alcohol impairs judgment, coordination, and reaction time even at low levels.
Question 7: In Missouri, an open container of alcohol found in the passenger area of a vehicle:
- May violate local ordinances and can support a DWI investigation (Correct answer)
- Is always legal for passengers statewide
- Is legal as long as the driver is not drinking
- Only matters if the vehicle is moving
Correct answer: May violate local ordinances and can support a DWI investigation
Missouri has no statewide open container ban for passengers, but many local ordinances prohibit it and it can be evidence of driver impairment.
MO DMV Alcohol and Drug Impairment Laws 2
In Missouri, what is the legal blood alcohol concentration (BAC) limit for drivers under 21 years old?