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Question

Difficulty: EasyBrake Failure Management

While driving on an open road, your foot brake suddenly loses all resistance and depresses completely to the floorboard without slowing the car down. Which action should you take first to attempt to restore braking control?

  1. Pump the brake pedal rapidly several times to try building up hydraulic pressure.Answer
  2. B
    Turn off the ignition switch immediately to bring the vehicle to a sudden stop.
  3. C
    Shift the transmission directly into Park or Reverse while moving at highway speed.
  4. D
    Yank the parking brake lever up with maximum force to instantly lock the rear wheels.

Answer

Rapidly pumping the brake pedal several times is the correct first action to attempt rebuilding hydraulic pressure.
When foot brakes suddenly fail, rapidly pumping the brake pedal is the standard initial action because modern dual-hydraulic systems can often build up sufficient residual fluid pressure to slow or stop the vehicle.

Step-by-Step Solution

1
Identify loss of pedal resistance.
Recognize primary foot brake system failure.
Immediate diagnostic awareness allows prompt emergency response.
2
Pump the brake pedal fast and repeatedly.
Compress remaining fluid in hydraulic lines.
Pumping can restore temporary hydraulic pressure in partial or dual-master-cylinder brake systems.
3
Prepare secondary control measures.
Downshift to lower gear and apply parking brake gradually if pumping fails.
Engine braking and controlled secondary braking bring the vehicle to a safe halt.

Key Concept

Hydraulic Brake Failure Management
Estimated Time:45s
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Topics

Brake Failure Management

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