Practice question

For the Washington CDL Air Brakes knowledge test, in which scenario should you NOT use the parking brake?

  1. When parking on level ground
  2. When brakes are extremely hot or wet in freezing weather
  3. Overnight in a warm climate
  4. When the trailer is full

Answer: B — When brakes are extremely hot or wet in freezing weather

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