Iowa CDL General Knowledge Practice Test
Practice 25 CDL general knowledge questions — safe driving techniques for commercial vehicles, cargo basics, and hours of service regulations for Iowa.
Mode:
Study mode: See the correct answer, hints, and detailed explanation after each question.
What this Iowa practice test covers
- Safe driving techniques and space management for large commercial vehicles
- Vehicle systems and controls — engine, transmission, coupling, and electrical
- Basic cargo securement principles and weight distribution
- Hours of service regulations, logbook rules, and driver fitness standards
The actual Iowa Iowa DOT knowledge test has 35 questions, and you need at least 28 correct (80%) to pass. This practice test is based on the Iowa Driver's Manual. The test fee is $8. Tests are administered Computer-based at DOT office, at school (Skip the Trip), or at home with parental supervision. Online testing is available in Iowa.