Iowa knowledge test
Iowa knowledge-test format and passing score
Iowa's operator knowledge test uses 25 questions with five allowed misses, which corresponds to an 80% passing score. Iowa DOT's official practice test also uses 25 randomly selected sample questions and requires 80% or higher.
- 25operator questions
- 5allowed misses
- 80%passing score
25 questions and five allowed misses
Iowa DOT's testing information lists the Iowa operator test as 25 questions with five allowed misses. That produces an 80% passing threshold.
The official practice test also uses 25 questions
The Iowa DOT practice test randomly selects 25 sample questions from a larger pool related to the real knowledge test. You can repeat it as often as you want and need 80% or higher for a passing result.
Iowa offers many test languages
Iowa DOT currently lists written and audio operator tests in multiple languages including Spanish, Polish, Portuguese, Russian, Ukrainian is not currently listed, and many others. Interpreter testing can be arranged by appointment when a needed language or dialect is not offered.
Related Road to Permit guides
Official sources
- Iowa DOT — CDL Testing (Iowa operator test 25/5)
- Iowa DOT — Practice Test
- Iowa DOT — Immigrant & Refugee Process
Independent study resource. Road to Permit is not affiliated with or endorsed by any DMV, DPS, FLHSMV or other government agency. Official state sources control if information changes.