Georgia Commercial Driver License Practice Test

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Prepare for the Georgia Commercial Driver License Exam. Review with flashcards and multiple choice questions, each offering hints and explanations for better understanding. Ace your exam with confidence!

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What happens when your air pressure falls to between 55-75 psi?

  1. You will receive a warning signal

  2. The brakes will automatically engage

  3. You will hear an alarm sound

  4. The engine will shut down

The correct answer is: You will receive a warning signal

When the air pressure in a commercial vehicle's air brake system falls to between 55 and 75 psi, you will receive a warning signal. This is an important safety feature designed to alert the driver that the air pressure is falling below the safe operating range. The warning signal typically activates a light on the dashboard or an audible alarm, indicating that the driver needs to take action to either increase the air pressure or stop the vehicle safely. Maintaining adequate air pressure is crucial for effective braking performance. If the air pressure drops too low, the vehicle may not have sufficient braking power, which poses significant safety risks. The other options suggest different actions that occur at varying pressure levels. For example, brakes engaging automatically would typically happen at a lower pressure threshold, while alarms are usually more general warnings rather than specific signals tied to a precise range. Understanding the function of warning signals helps ensure that drivers can respond appropriately to maintain safety on the road.