Practice question

For the Washington CDL Air Brakes knowledge test, you should NOT use the parking brake if:

  1. You are parked on level ground
  2. The brakes are very hot (such as just after going down a long mountain grade) or wet in freezing weather where they could freeze
  3. You are parked overnight
  4. The vehicle is empty

Answer: B — The brakes are very hot (such as just after going down a long mountain grade) or wet in freezing weather where they could freeze

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

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