Final answer:
The extreme right-hand position of the ME-42 brake valve handle typically indicates a 'release' or 'running' state for the train's air brake system. The specific meaning of (28-81) would require consulting the model's technical documentation.
Step-by-step explanation:
When discussing the ME-42 brake valve, it's important to understand its context within railroad engineering and air brake systems. The position of the brake valve handle is crucial for the operation of a train's braking system. If the brake valve handle is in its extreme right-hand position, typically, it signifies that the valve is in the release, running, or lead position, depending on the specific design of the brake system. In this position, it would allow for the release of air pressure from the brake pipe and subsequently, the release of the brakes on the train cars. For a specific answer regarding the ME-42 brake valve, you would need to consult the specific manual or technical documentation related to that model as the notation (28-81) could refer to proprietary or model-specific information.
In the context of engineering, the ME-42 brake valve is a component used in hydraulic brake systems. When the brake valve handle is in its extreme right hand position, it means the valve is in the (28-81) configuration. This configuration determines the amount of pressure applied to the brakes and regulates the amount of braking force exerted on the wheels.