E. LearndmvDMV PRACTICE
Find your state Exam types Practice tests Sign in Create account ↗
Practice quizzes / Illinois CDL Air Brakes Practice Questions - Illinois CDL Air Brakes Knowledge Test Exam / Question 99546
Practice question

What is the maximum air loss allowed in one minute for a single vehicle with the brake pedal fully applied?

  1. 2 psi
  2. 3 psi
  3. 4 psi
  4. 10 psi

Answer: B — 3 psi

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Illinois CDL Air Brakes Practice Questions - Illinois CDL Air Brakes Knowledge Test Exam →
Learndmv.

Thoughtful practice for the road ahead. Find permit, road signs and CDL preparation by state.

Explore

Practice by stateAll practice testsExam types

Your account

My profilePractice historyAccount security

Get started

Create accountSign inSitemap
© 2026 LearndmvIndependent practice resource · Not affiliated with any state DMV.