The service air line is attached to the:
Answers
Relay valves.
Supply line.
Emergency air line.
Steering wheel.
The correct answer and explanation is:
The correct answer is Supply line.
Explanation:
In a pneumatic or air brake system, such as those used in trucks, buses, and other heavy vehicles, the service air line is crucial for the operation of the braking system. It is responsible for transmitting compressed air from the air compressor to the various components of the brake system. Specifically, the service air line is connected to the supply line, which is a direct connection to the air compressor and the vehicle’s air reservoir.
Let’s break down the components:
- Supply Line: This is the main line that connects the air compressor (or a storage tank) to the entire brake system. The supply line carries compressed air at a high pressure to the vehicle’s air system and is responsible for providing air to the service brakes. The service air line branches off from the supply line to various components of the vehicle’s brake system, including the relay valves and the brake chambers on each axle.
- Service Air Line: This line connects the supply line to the brake system’s actuators. When the driver applies the brakes, the service air line carries compressed air to the brake chambers, where it forces the brake shoes or pads against the drum or disc, slowing the vehicle down. The pressure in the service air line is modulated by the brake pedal’s movement, controlling the braking force.
- Relay Valves: These are valves that are used to control the distribution of air in the brake system. The relay valve helps to direct compressed air to the brake chambers when needed but is not the direct attachment point for the service air line. The service air line sends air through these valves to activate the braking mechanism.
- Emergency Air Line: The emergency air line is responsible for supplying air to the emergency brake system, which is activated in case of a failure of the primary braking system. It is not the same as the service air line.
- Steering Wheel: The steering wheel is used to control the direction of the vehicle and is not related to the pneumatic brake system.
In conclusion, the supply line is where the service air line is attached, making it the correct answer.