Michigan State Brakes Certification Practice Exam

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Prepare for the Michigan State Brakes Certification Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Ace your brakes certification with confidence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the function of wheel speed sensors in a braking system?

To increase brake pad wear
To send an A/C signal to the control module
To deactivate the brake system
To supply hydraulic pressure to the brakes

The correct answer is: To send an A/C signal to the control module

Wheel speed sensors play a crucial role in the performance of a vehicle's braking system, particularly in systems that are equipped with anti-lock braking systems (ABS). Their primary function is to monitor the rotational speed of each wheel and communicate that data to the vehicle's control module. In the context of the given question, the correct answer points out that wheel speed sensors send an alternating current (A/C) signal to the control module. This signal allows the control module to continuously assess the speed of each wheel, ensuring that the braking force is appropriately modulated to avoid wheel lockup during hard braking. This modulation is essential for maintaining vehicle control and stability, especially on slippery surfaces. The other options do not accurately reflect the role of wheel speed sensors. For instance, increasing brake pad wear is not a function of the sensors; instead, they help ensure optimal braking performance which can actually minimize wear. Deactivating the brake system is counterproductive to safety, and wheel speed sensors are integral in activating or adjusting braking force rather than disabling it. Lastly, wheel speed sensors do not supply hydraulic pressure; this function is performed by the master cylinder and brake lines within the braking system.