Question 27 - Combination Vehicles Test Practice Test for the CDL

What test do the following steps describe?

  1. Charge the trailer brake system.
  2. Turn off the engine.
  3. Alternate stepping on and off the brake pedal to reduce the air pressure in the tractor air tanks.

Create a FREE profile to save your progress and scores!

Create a Profile

Already signed up? Sign in

Unlock all features!

  • 2x Bonus Practice questions
  • Exam simulation mode
  • Printer friendly downloads
  • Personalized cram course
  • Ad-free studying
  • Money-back guarantee
Upgrade to Premium