Air Brake Practice Test 2026 – All-in-One Resource to Master Your Certification!

Question: 1 / 400

What happens if the brake pedal is held down for too long during air braking?

Brakes will automatically disengage

There is a risk of overheating and brake failure

When the brake pedal is held down for an extended period during air braking, there is a significant risk of overheating the brakes. This overheating can occur because the friction generated when the brakes are applied produces heat, and if the pressure is maintained continuously, the brakes do not have a chance to cool down. Overheated brakes can lead to several issues, including brake fade, where the brakes become less effective, and in extreme cases, can result in complete brake failure.

Maintaining pressure on the brakes for a prolonged duration prevents the heat from dissipating, potentially damaging brake components and significantly impairing their performance. This highlights the importance of using air brakes effectively and releasing the pedal periodically to allow for brake cooling.

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No significant effects on braking

Pressure will build up in the brake system

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