Iowa DOT exam simulator
Take the knowledge test the way the DOT gives it: 25 questions picked at random from all 275 of ours, 20 correct to pass. You only see your answers at the end. Pass three in a row and you're ready for the real thing.
25 questions · 20 to pass
How the simulator works
- Every attempt draws a new random set of 25 questions from across the handbook.
- No feedback until you finish, as in the real test. Then you see your score and every question you missed, with the explanation and handbook reference.
- Your results stay in this browser. After three passes in a row you'll see "You're ready".
- The DOT doesn't publish a time limit for this test, so the clock just shows how long you've taken.
About the real Iowa DOT test
The operator knowledge test covers Iowa traffic laws and highway signs. Take it by appointment at a DOT location or county treasurer's office, or at a participating school (Skip the Trip). Students within 30 days of their 14th birthday and under 18 can take it at home on a laptop or desktop (not a phone or tablet), with a parent or guardian proctor who holds a valid Iowa driver's license.
- If you fail: If you fail, you may retake the test when the examiner allows; there is no fixed waiting period. Test results are valid 180 days.
- Fee: Iowa DOT does not list a separate test fee. The instruction permit costs $6 and is valid 4 years.
- Audio or oral test: If you can't read or understand the written test, you may ask for an oral test, given by an examiner or an automated testing device.
On test day
- Bring the documents on the Iowa what-to-bring list, and check you meet the minimum age (14).
- You'll take a vision test first: Screened without lenses: 20/40 or better (both eyes or better eye) = no restriction; less than 20/40 but at least 20/70 = no driving when headlights are required. Screened with lenses: same thresholds plus a corrective-lens restriction. A driving test is required the first time acuity measures below 20/40, and an applicant who cannot reach 20/40 gets a two-year license. If an applicant cannot attain 20/40 in at least one eye (but can attain 20/70), the license is not issued until a vision specialist's report is submitted. Below 20/70 = denied (discretionary review possible). Left eye below 20/100 = outside mirrors on both sides. Binocular field at least 140 degrees = no restriction; 110-139 degrees (or one eye at least 100 degrees) = outside mirrors both sides; less = denied (discretionary review possible). Bring your glasses or contacts if you wear them.
- Read each question and every answer to the end before choosing; watch for words like "not" and "except".
- Review the hardest questions the night before: exact numbers are where most points are lost.
Questions
How many questions are on the Iowa permit test?
The Iowa DOT knowledge test has 25 questions and you need 20 correct to pass (80%).
How old do you have to be to get a learner's permit in Iowa?
14. You then hold the permit for at least 12 months (instruction permit, or permit plus special minor's restricted license) before an intermediate license at 16 before the road test and 20 hours of supervised driving, including 2 at night.
What happens if I fail the Iowa permit test?
You can retake it: If you fail, you may retake the test when the examiner allows; there is no fixed waiting period. Test results are valid 180 days.
What do I need to bring for the Iowa permit test?
Primary form of identification; Proof of residency; Proof of Social Security number; Parent or guardian written consent (in person or form 430018).
What is the vision requirement in Iowa?
Screened without lenses: 20/40 or better (both eyes or better eye) = no restriction; less than 20/40 but at least 20/70 = no driving when headlights are required. Screened with lenses: same thresholds plus a corrective-lens restriction. A driving test is required the first time acuity measures below 20/40, and an applicant who cannot reach 20/40 gets a two-year license. If an applicant cannot attain 20/40 in at least one eye (but can attain 20/70), the license is not issued until a vision specialist's report is submitted. Below 20/70 = denied (discretionary review possible). Left eye below 20/100 = outside mirrors on both sides. Binocular field at least 140 degrees = no restriction; 110-139 degrees (or one eye at least 100 degrees) = outside mirrors both sides; less = denied (discretionary review possible).
Test format from the Iowa Department of Transportation, Motor Vehicle Division: official test information.