Texas CDL General Knowledge Practice Exam 2026 - Free CDL Practice Questions and Study Guide

The correct response is to pump the brake pedal to generate pressure. When hydraulic brakes fail, it often results in a loss of pressure, making the brake pedal feel spongy or cause it to go all the way to the floor without effective braking action. By pumping the brake pedal, you can help build up some pressure in the brake lines, which may allow for limited braking capability. This action can potentially bring the vehicle to a stop or slow it down enough to reach a safe area or emergency stop position.

The other actions suggested do not effectively address the situation. Changing the radio station or calling a friend would distract you from the critical need to manage the vehicle and respond to the brake failure. Speeding up could exacerbate the situation and make it significantly harder to control the vehicle, increasing the risk of a collision or accident. Thus, pumping the brake pedal is the most practical response to regain some level of control over the vehicle’s braking system in the event of hydraulic failure.