Practice question

Which statement about trailer brakes is correct?

  1. The trailer hand valve applies trailer service brakes and is not a parking brake.
  2. This statement confuses the tested combination-vehicle rule with an unrelated CDL topic.
  3. This answer would create an unsafe coupling, braking, turning, or inspection habit.
  4. This choice is not supported by the Texas CDL handbook or FMCSA combination-vehicle standards.

Answer: A — The trailer hand valve applies trailer service brakes and is not a parking brake.

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 →