Arkansas Commercial Driver License (CDL) Practice Test

When are you more likely to experience hydroplaning?

1. On a hot day

2. If tire pressure is low or tread is worn

3. During a foggy morning

4. If your vehicle is new

The correct answer is: If tire pressure is low or tread is worn

Hydroplaning occurs when a vehicle's tires lose traction with the roadway due to a layer of water between the tire and the surface. The likelihood of hydroplaning increases significantly when tire pressure is low or when the tread is worn down. This is because tires with insufficient pressure or inadequate tread depth cannot effectively channel water away from the contact surface. When the tires cannot displace water rapidly enough, they float on top of the water instead of making proper contact with the road, leading to a loss of control. On the other hand, factors such as hot weather, foggy conditions, or whether the vehicle is new do not inherently increase the risk of hydroplaning. Hot days may dry out roads or lead to other weather-related issues, but they do not directly contribute to the water accumulation that causes hydroplaning. Similarly, fog may reduce visibility but does not affect the interaction between tires and wet road surfaces. New vehicles, depending on their tire condition and pressure, can still hydroplane if the tires are not appropriately maintained or if road conditions are right, but the vehicle's newness itself is not a determining factor for hydroplaning risk.