Ontario MTO Truck Knowledge Practice Test

When should fanning the brakes be used to assist in controlling the vehicle?

1. During heavy traffic

2. In slippery situations

3. At intersections

4. On straight roads

The correct answer is: In slippery situations

Fanning the brakes is particularly useful in slippery situations. This technique involves applying the brakes lightly and intermittently to help maintain traction and control of the vehicle without locking up the wheels. On slippery surfaces, such as during rain or snow, fanning the brakes allows the driver to modulate the braking force, reducing the risk of skidding and helping to stabilize the truck's movements. Effective use of this technique can improve safety by allowing for better control while navigating potentially hazardous conditions. In heavy traffic, at intersections, or on straight roads, other techniques or strategies may be more appropriate for maintaining control of the vehicle, as the dynamics of the driving environment can differ significantly.