Automotive Service Excellence (ASE) Brakes Certification Practice Exam 2026 - Free ASE Brakes Practice Questions and Study Guide

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What is the primary function of a brake booster?

To increase brake fluid pressure

To amplify the force applied to the brake pedal

The primary function of a brake booster is to amplify the force applied to the brake pedal. When a driver presses the brake pedal, the booster uses vacuum pressure (in most cases) to increase the force exerted on the brake master cylinder. This amplification enables the brake system to engage more effectively with less physical effort from the driver, resulting in improved braking performance and responsiveness.

In many vehicles, this system is essential, especially in those equipped with power brakes, where greater force is required to activate the brakes efficiently. A properly functioning brake booster allows for easier and more effective braking, contributing to safety and control while driving. Understanding this function helps in diagnosing braking issues and ensuring optimal brake system performance.

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To cool the brake system

To monitor brake wear

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