Georgia Commercial Driver License Practice Test

What additional element should be monitored on a dual air brake system?

1. It requires two different control systems

2. Both systems alert when low pressure occurs

3. They operate separately at all times

4. They can only function with a full air tank

The correct answer is: Both systems alert when low pressure occurs

Monitoring both systems in a dual air brake system is essential because both systems are designed to alert the driver when there is low air pressure. In a dual air brake system, there are typically two separate braking circuits to enhance safety; if one circuit fails, the other can still function to provide stopping power. Each system is equipped with pressure gauges and warning lights or alarms that activate when the air pressure falls below a certain threshold, signaling that there may be a problem. This feature is critical as it helps prevent a situation where the driver is unaware of a potentially dangerous low-pressure condition in one of the brake systems. Understanding this alert mechanism is vital for ensuring safe vehicle operation and maintaining the braking performance of commercial vehicles.