On a dual air system, which tank do you watch during the low warning test?
Right! On dual systems, the warning must come on before the lowest-pressure tank drops below 60 psi. 📖 p. 76
From Section 5 of the Illinois Commercial Driver’s License Study Guide
Illinois CDL Air Brakes Practice Test
Who takes it: every CDL class (A, B and C).
Needed to drive a truck or bus with full or partial air brakes. Without it, your CDL gets an air brake restriction. 25 questions, 20 right to pass (80%).
Practice Air Brakes
- 10questions a round
- 1manual section
Take the Air Brakes test
- 25questions
- 20correct to pass
- –no test taken yet
A Air Brakes question to try
Tap an answer to see if you’re right, and the page
Where it is in the Illinois Commercial Driver’s License Study Guide
Your score on each part fills in as you study.
- Manual section 5
- Air brakesNot practiced yetp. 71 to 80
Illinois answers about this test
Practice material, not the official test: check every answer in your state's current handbook. Disclaimer · How the rounds work · SOS
All Illinois CDL tests
- General Knowledge
- Combination Vehicles
- Air BrakesYou're here
- Doubles and Triples
- Passenger
- School Bus
- Charter Bus
- Tank Vehicles
- Hazardous Materials
- Which tests do you need?Pick what you'll drive and get your Illinois CDL plan, in order.