Practice question

What happens in a truck's pneumatic brake system if air pressure drops catastrophically while driving?

  1. The engine accelerates to maximum speed
  2. The mechanical spring brake actuators (энергоаккумуляторы) release their powerful stored springs, locking the rear wheels into an emergency stop
  3. The steering wheel locks instantly
  4. The truck coasts freely with no braking whatsoever

Answer: B — The mechanical spring brake actuators (энергоаккумуляторы) release their powerful stored springs, locking the rear wheels into an emergency stop

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