When must you chock the trailer wheels while uncoupling?
Right! Air could leak from the trailer tank and release its emergency brakes. 📖 p. 6-9
From Section 6 of the Indiana BMV Commercial Driver's License Manual
Indiana CDL Combination Vehicles Practice Test
Who takes it: Class A.
Tractor-trailers and trucks pulling a heavy trailer. 20 questions, 16 right to pass (80%).
Practice Combination Vehicles
- 10questions a round
- 1manual section
Take the Combination Vehicles test
- 20questions
- 16correct to pass
- –no test taken yet
A Combination Vehicles question to try
Tap an answer to see if you’re right, and the page
Where it is in the Indiana BMV Commercial Driver's License Manual
Your score on each part fills in as you study.
- Manual section 6
- Combination vehiclesNot practiced yetp. 6-1 to 6-14
Indiana answers about this test
Practice material, not the official test: check every answer in your state's current handbook. Disclaimer · How the rounds work · BMV
All Indiana CDL tests
- General Knowledge
- Combination VehiclesYou're here
- Air Brakes
- Doubles and Triples
- Passenger
- School Bus
- Tank Vehicles
- Hazardous Materials
- Which tests do you need?Pick what you'll drive and get your Indiana CDL plan, in order.