Iowa CDL manual and tests
Iowa publishes the AAMVA model CDL manual with its own cover, so CDL Coach's questions match it section for section.
The manual
Hy-Brid Version: October 2023 (2005 Testing System with supplemental sections 11 and 12) · 170 pages · the agency's page
| Section | Title | Starts on |
|---|---|---|
| 1 | Introduction | p. 12 |
| 2 | Driving Safely | p. 24 |
| 3 | Transporting Cargo Safely | p. 69 |
| 4 | Transporting Passengers Safely | p. 73 |
| 5 | Air Brakes | p. 77 |
| 6 | Combination Vehicles | p. 87 |
| 7 | Doubles and Triples | p. 101 |
| 8 | Tank Vehicles | p. 105 |
| 9 | Hazardous Materials | p. 108 |
| 10 | School Buses | p. 131 |
| 11 | Vehicle Inspection | p. 143 |
| 12 | Basic Control Skills | p. 158 |
| 13 | On-road Driving | p. 165 |
Iowa extras
- Iowa CDL Quick Guide with Supplement for Modernized Versionsupplement · March 2026
What you can practise
- General Knowledge50 questions on the test, 80% to pass · 180 practice questions
- Air Brakes25 questions on the test, 80% to pass · 40 practice questions
- Combination Vehicles20 questions on the test, 80% to pass · 35 practice questions
- Passenger20 questions on the test, 80% to pass · 25 practice questions
- School Bus20 questions on the test, 80% to pass · 35 practice questions
- Tank Vehicles20 questions on the test, 80% to pass · 25 practice questions
- Hazardous Materials30 questions on the test, 80% to pass · 50 practice questions
- Doubles and Triples20 questions on the test, 80% to pass · 30 practice questions
Counts are the AAMVA practice format. Iowa's test may differ; the pass mark is 80% almost everywhere.