On a tractor-trailer, which valves should pop out when pressure falls to the spring brake level?
Right! On a tractor-trailer, both of these valves should pop out at the spring brake pressure. 📖 p. 5-7
From Section 5 of the Vermont Commercial Driver’s Manual
Vermont CDL Air Brakes Practice Test
Who takes it: every CDL class (A, B and C).
Needed to drive a truck or bus with 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 Vermont Commercial Driver’s Manual
Your score on each part fills in as you study.
- Manual section 5
- Air brakesNot practiced yetp. 5-1 to 5-10
Vermont answers about this test
Practice material, not the official test: check every answer in your state's current handbook. Disclaimer · How the rounds work · DMV
All Vermont CDL tests
- General Knowledge
- Combination Vehicles
- Air BrakesYou're here
- Doubles and Triples
- Passenger
- School Bus
- Tank Vehicles
- Hazardous Materials
- Which tests do you need?Pick what you'll drive and get your Vermont CDL plan, in order.