Air Brake Practice Test

You should be aware that your brakes are starting to fade when-

1. Each stop needs relatively little pressure on the brake pedal

2. Adding pressure makes the brake feel spongy

3. You have to press hard on the brake pedal to control downgrade speed

4. Pressure is extended on the brake pedal and speed tires

The correct answer is: You have to press hard on the brake pedal to control downgrade speed

The scenario where you have to press hard on the brake pedal to control downgrade speed is indicative of brake fade. Brake fade refers to the reduction in braking effectiveness that occurs due to overheating of the brakes, which can lead to a diminished ability to slow down or stop effectively. When braking on a downgrade, your brakes face additional strain as gravity pulls the vehicle downwards, and if the brakes are fading, they will require more force from the driver to maintain control, resulting in a need to apply significant pressure on the pedal. This is a critical observation for safe driving because it signals that the brakes may not be functioning optimally. If a driver experiences this, it’s important to take immediate action, such as reducing speed or finding a safe area to pull over, to prevent a potential loss of control. Understanding this aspect of braking dynamics helps drivers recognize the signs of brake fade early, allowing for preventive measures to be taken.