True or False: Engine braking is useful for controlling speed on downhill grades.

Engine braking is indeed a useful technique for controlling speed on downhill grades. When a driver downshifts the transmission to a lower gear while descending, the engine creates resistance, which helps slow the vehicle down without relying solely on the brakes. This is particularly important in large vehicles, such as trucks, which can gain significant momentum due to their weight when going downhill.

By utilizing engine braking, drivers can reduce the risk of brake overheating, which can occur if the brakes are applied continuously and can lead to decreased braking efficiency. This method also provides better overall control of the vehicle, enhancing safety on steep declines. It’s crucial for commercial drivers to be familiar with engine braking, as it plays a vital role in managing vehicle speed in hilly or mountainous terrain, ultimately promoting safer driving practices in challenging conditions.