Ontario MTO Truck Knowledge Practice Test

Is the statement true or false: Fanning reduces air pressure and serves no useful purpose on dry pavement?

1. True

2. False

3. Depends on the vehicle

4. Only in emergency situations

The correct answer is: True

The statement is true. Fanning, which refers to the process of deploying a brake or throttle input in a way that modulates air pressure, is generally more relevant in reducing speed or controlling descent on slippery surfaces or during specific maneuvers. On dry pavement, this technique often leads to unnecessary air pressure reduction without providing significant benefits, such as improved traction or control in typical driving conditions. Therefore, fanning doesn't serve a useful purpose in those scenarios as it can result in inefficiencies or even compromise handling ability.