Iowa CDL Air Brakes Test

Learn about air brake systems, operation, and safety procedures required for commercial vehicles.

25 Questions
20/25 to Pass
30 Minutes
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About the Air Brakes Test

Learn about air brake systems, operation, and safety procedures required for commercial vehicles.

Test Requirements

  • Number of questions: 25
  • Correct answers to pass: 20 out of 25
  • Passing score: 80%
  • Time limit: 30 minutes

Iowa DMV Information

Iowa Department of Transportation – Motor Vehicle Division

Visit IA DMV Website