Heavy Duty Equipment Technician Red Seal Exam Prep · Question
Bleeding a hydraulic brake system is performed to remove which common contaminant that can cause a spongy pedal feel?
Air trapped in a hydraulic brake system is compressible, which results in a spongy brake pedal feel and reduced braking efficiency. Bleeding the brakes removes
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Question: Bleeding a hydraulic brake system is performed to remove which common contaminant that can cause a spongy pedal feel?
Answer options:
- Excess brake fluid
- Water vapour ✅ Air
- Dirt particles
Correct answer: Air
Explanation: Air trapped in a hydraulic brake system is compressible, which results in a spongy brake pedal feel and reduced braking efficiency. Bleeding the brakes removes this trapped air, restoring a firm pedal.
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