If a hydraulic brake system loses pressure, which response may help you stop safely?
Correct answer: D. – All of the above
When hydraulic pressure is lost, downshifting can help reduce speed and pumping the brake pedal may generate enough pressure to stop. The separate parking or emergency brake may also be applied carefully and modulated to avoid locking the wheels. At the same time, look for an escape ramp, an uphill road, an open field, or another suitable escape route.
Source: Georgia Commercial Driver’s Study Guide — § 2.17.3, “Brake Failure—Loss of Hydraulic Pressure”


