Practice question

When preparing for the Georgia CDL air-brake exam, how should you safely apply the trailer brakes only, for example to test the trailer's emergency function?

  1. With the foot valve
  2. By pulling the red 8-sided trailer air supply knob OUT, which exhausts the supply line and applies the trailer spring brakes
  3. Using only the parking brake
  4. Disconnecting the glad hands

Answer: B — By pulling the red 8-sided trailer air supply knob OUT, which exhausts the supply line and applies the trailer spring brakes

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

Practice more: Georgia CDL Air Brakes Test Practice Questions - Georgia Commercial Driver License (CDL) Air Brakes Knowledge Test Exam →