Which of the following might reduce brake effectiveness?

Wet brake conditions can significantly reduce brake effectiveness because water can create a film between the brake pads and rotors, leading to decreased friction. When the brakes are wet, it takes longer for the brakes to engage properly, increasing stopping distances and making it harder to control the vehicle. Moreover, wet conditions can also lead to brake fade, where the brakes become less effective due to overheating and moisture absorption. This is particularly critical for commercial drivers to understand, as it can have serious implications for safety on the road.

On the other hand, regularly adjusting brake pads helps maintain optimal contact and effectiveness, while using the correct brake fluid ensures proper hydraulic function in the brake system. Maintaining proper tire pressure contributes to better traction and overall handling, which can enhance braking performance.