Practice question

The service brake system:

  1. Applies and releases the brakes when you press the brake pedal while driving normally.
  2. Applies and releases the parking brakes.
  3. Applies and releases the emergency brake.
  4. Applies and releases the axle brake.

Answer: A — Applies and releases the brakes when you press the brake pedal while driving normally.

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Practice more: Pennsylvania CDL Class B Knowledge Test 2 →