Question

Explain Why brakes fail in hydraulic breaking system when air gets into the system

Answer 1

Answer:

How would the hydraulic brake system work if air bubbles enter the system? ... in terms of brakes when air trapped inside the brake lines, due to high pressure trapped air get compressed, which make spongy brake pedal and which also cause brake failure.

Explanation:

Answer 2

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Air is much less dense when compared to the brake fluid. This means if air is in the lines it will compress too easily.