To help avoid brake fade, what should you ensure is correct before a downhill run?

To help avoid brake fade, what should you ensure is correct before a downhill run?

• A. The battery voltage
• B. The air pressure
• C. The tire tread depth
• D. The headlight alignment

Answer: (B)

Brake fade happens when braking power drops as brakes heat up. Before a downhill run, you need the braking system to have enough pneumatic force to apply and hold the brakes. In vehicles with air brakes, the brakes are activated by air from the tanks, so if the air pressure is too low, braking can become weak or delayed and fade as you descend. Checking the air pressure gauge and confirming it’s within the manufacturer’s safe range ensures there’s sufficient pressure to brake effectively, especially when you’ll rely on gradual, controlled braking on a long descent. The other items don’t directly control brake performance during a downhill, so they don’t help prevent fade in the same way.

Brake fade happens when braking power drops as brakes heat up. Before a downhill run, you need the braking system to have enough pneumatic force to apply and hold the brakes. In vehicles with air brakes, the brakes are activated by air from the tanks, so if the air pressure is too low, braking can become weak or delayed and fade as you descend. Checking the air pressure gauge and confirming it’s within the manufacturer’s safe range ensures there’s sufficient pressure to brake effectively, especially when you’ll rely on gradual, controlled braking on a long descent. The other items don’t directly control brake performance during a downhill, so they don’t help prevent fade in the same way.