Question 2037
If your passenger car has power-assisted brakes, what happens if the engine is stopped and the ignition is off?
- You will have to apply the parking brake more firmly.
- The wheels lock.
- You will have to apply more pressure to the brake pedal to brake.
Show answer and explanation
Correct answer: You will have to apply more pressure to the brake pedal to brake.
The brake booster uses engine vacuum to increase the force applied when braking. Without this assistance, you need to press the pedal harder.