Practice question

When climbing a steep grade with a heavy combination vehicle, the best practice is to:

  1. Maintain top gear as long as possible
  2. Downshift early before losing speed so the engine stays in its power band
  3. Use the trailer hand valve to assist
  4. Push the trailer air supply knob in and out repeatedly

Answer: B — Downshift early before losing speed so the engine stays in its power band

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

Practice more: AK CDL Combination Practice Questions - Alaska CDL Combination Vehicles Test Exam →