Practice question

Which statement about trailer brakes is correct?

  1. This answer would create an unsafe coupling, braking, turning, or inspection habit.
  2. This choice is not supported by the Texas CDL handbook or FMCSA combination-vehicle standards.
  3. Loss of trailer air supply can apply trailer emergency or spring brakes.
  4. This statement confuses the tested combination-vehicle rule with an unrelated CDL topic.

Answer: C — Loss of trailer air supply can apply trailer emergency or spring brakes.

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

Practice more: TX CDL Combination Practice Questions - Texas CDL Combination Vehicles Test Exam →