Final answer:
The three systems found in modern air brake systems are Service brakes, Parking brakes, and Emergency brakes. Service brakes are used to slow down or stop the vehicle during normal driving conditions. Parking brakes are used to keep the vehicle stationary when parked, and Emergency brakes provide additional braking power in emergency situations.
Step-by-step explanation:
The three systems found in modern air brake systems are Service brakes, Parking brakes, and Emergency brakes.
Service brakes are the primary braking system in a vehicle. They are operated by the driver using the brake pedal and are responsible for slowing down or stopping the vehicle during normal driving conditions.
Parking brakes, also known as handbrakes, are used to keep the vehicle stationary when parked. They are typically operated manually and can be engaged as a separate system from the service brakes.
Emergency brakes, also known as e-brakes or brake systems, are designed to be used in emergency situations, such as when the service brakes fail. They provide additional braking power to help bring the vehicle to a stop.