Practice question

For the Washington CDL Air Brakes knowledge test, what is controlled braking in an emergency stop with air brakes?

  1. Pressing the pedal as hard as possible and holding it
  2. Applying the brakes as hard as you can without locking the wheels, then releasing slightly if wheels lock
  3. Using only the parking brake
  4. Pumping the pedal rapidly

Answer: B — Applying the brakes as hard as you can without locking the wheels, then releasing slightly if wheels lock

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