Mississippi Written Drivers Test Practice

What is one of the key reasons for using lower gears if your brakes fail?

1. To increase speed

2. To enhance power steering

3. To slow down the vehicle through engine braking

4. To engage the parking brake

The correct answer is: To slow down the vehicle through engine braking

Using lower gears when brakes fail is important because it allows for engine braking, which helps to slow down the vehicle. In lower gears, the engine's resistance increases, creating a slowing effect on the wheels when the driver releases the accelerator. This is particularly useful in emergency situations, as it helps reduce speed without relying on the brakes. Increasing speed would not be beneficial in a situation where brakes have failed; rather, the goal is to reduce speed. Enhancing power steering is unrelated to braking and would not aid in stopping the vehicle. Engaging the parking brake is typically a last resort and can cause wheels to lock up, leading to a loss of control, particularly at higher speeds. Therefore, utilizing lower gears effectively provides a controlled and safer method to decrease speed in the absence of functioning brakes.