Practice question

Why must the air brake reservoir tanks on a heavy commercial lorry be drained daily by the driver?

  1. To prevent the air pressure from escaping through the tires
  2. To remove water and oil that can freeze or corrode the brake system
  3. To adjust the tension of the brake pedal mechanism
  4. To clean the internal air filter of the diesel engine

Answer: B — To remove water and oil that can freeze or corrode the brake system

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