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Missouri permit test: alcohol, drugs and dui

BAC limits, administrative actions, implied consent, ignition interlock, alcohol, marijuana and other drugs. 20 questions, 10 at a time, starting with ones you haven't seen.

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Rules to remember10 key alcohol, drugs and dui rulesShow the rules
  1. The officer gives you a notice; the suspension or revocation takes effect after 15 days. (p. 69)
  2. Injuring or killing someone because you drove impaired can mean 2 to 7 years in jail, a $5,000 fine, and a five-year license loss. (p. 69)
  3. A second DWI offense can bring up to one year in jail and up to a $1,000 fine. (p. 70)
  4. Proof of insurance, usually an SR-22 filing, must stay on file with the Driver License Bureau for two years. (p. 71)
  5. Reinstatement requires a $45 fee, proof you completed SATOP or a comparable program, and SR-22 proof of insurance for two years. (p. 72)
  6. Refusing a chemical test to determine your BAC means your license is taken away for one year. (p. 72)
  7. Drivers under 21 may not drive with a BAC of 0.02% or more, so even one drink can put you over. (p. 73)
  8. Missouri's DWI law covers impairment by alcohol, illegal drugs, prescription and over-the-counter medicine, and the penalties are exactly the same. (p. 73)
  9. A drug that may cause drowsiness or dizziness is one you should not take before driving. (p. 73)
  10. Even though medical marijuana is approved in Missouri, it is never legal or safe to drive while under its influence. (p. 74)

Taken from the explanations to checked practice questions; page numbers link to the official handbook.

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Sample alcohol, drugs and dui questions

  1. 1.What is the most a court can impose for a first DWI conviction in Missouri?

    • AUp to six months in jail and a $500 fine
    • BUp to one year in jail and a $1,000 fine
    • CUp to four years in jail and a $5,000 fine
    • DUp to 30 days in jail and a $100 fine
    Show the answer

    ✓ A. Up to six months in jail and a $500 fine

    A first DWI or BAC conviction can bring up to six months in jail and a fine of up to $500, plus loss of driving privileges.

    Source: Missouri Driver Guide (Revised August 2026), page 73

  2. 2.A police officer stops you and asks you to take a chemical test of your BAC. You refuse. What happens to your license?

    • AIt is taken away for 90 days
    • BNothing, the test is optional
    • CIt is taken away for five years
    • DIt is taken away for one year
    Show the answer

    ✓ D. It is taken away for one year

    Refusing a chemical test to determine your BAC means your license is taken away for one year.

    Source: Missouri Driver Guide (Revised August 2026), page 72

  3. 3.You drive while impaired by a prescription medicine, not alcohol. How do Missouri's DWI penalties compare?

    • AThey are exactly the same as for alcohol
    • BThere is no penalty if the drug was prescribed
    • CThey are lighter for prescription drugs
    • DOnly a warning applies for a first offense
    Show the answer

    ✓ A. They are exactly the same as for alcohol

    Missouri's DWI law covers impairment by alcohol, illegal drugs, prescription and over-the-counter medicine, and the penalties are exactly the same.

    Source: Missouri Driver Guide (Revised August 2026), page 73

  4. 4.Besides a hearing, what can the administrative notice let an eligible driver request?

    • AA permanent waiver of DWI penalties
    • BA refund of a roadside fine paid
    • CA new license with a clean record
    • DA 90-day Restricted Driving Privilege
    Show the answer

    ✓ D. A 90-day Restricted Driving Privilege

    The notice lets you request a hearing or, if eligible, an immediate 90-day Restricted Driving Privilege (RDP).

    Source: Missouri Driver Guide (Revised August 2026), page 69