Automotive Service Excellence (ASE) Brakes Certification Practice Exam 2025 – Comprehensive All-in-One Guide to Exam Success!

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What effect does a defective primary brake circuit have on pedal feel?

It remains firm

It feels lower

A defective primary brake circuit typically results in a compromised brake system, which can lead to a decreased pedal feel. When this occurs, drivers may experience a brake pedal that feels lower than usual when pressed. This is often due to fluid leaks or air entering the brake lines, which diminishes the hydraulic pressure necessary for effective braking.

In a functioning brake system, the hydraulic pressure is effectively transmitted from the brake pedal to the brake components, providing a firm and responsive feel. However, when the primary circuit is compromised, the pedal may have a longer travel before engaging, leading to that lower sensation. As the hydraulic system loses efficiency, pedal feedback can diminish, contributing to an overall poor braking experience.

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It becomes spongy

It can grab higher

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