Railway Track Diversion: Identifying the Turnout

The question asks us to identify a specific part of a railway track based on its function described as "The arrangement of point and crossing with lead rails by means of which the rolling stock may be diverted from one track to another." Let's look at the options provided and see which one matches this description.

Understanding the Description: Diversion of Rolling Stock

The key function mentioned in the description is the ability to divert rolling stock (trains or railway vehicles) from one railway track to another. This involves an "arrangement of point and crossing with lead rails." This entire setup is crucial for managing train movements, allowing trains to switch tracks, enter or exit sidings, or navigate complex rail networks.

Analyzing the Options

Let's examine each option:

• Stock rail: A stock rail is one of the main rails in a turnout installation. The switch rail moves against the stock rail to allow a train to change tracks. While essential, a stock rail is just one component of the entire diversion arrangement, not the arrangement itself.
• Turn out: A turnout, also known as points or a railway switch, is precisely the complete mechanical installation that includes switch rails, stock rails, a frog (crossing), and associated components. Its purpose is specifically to guide rolling stock from one track to another. This definition perfectly aligns with the description provided in the question.
• Switches: Switches are the movable rails within a turnout that enable the diversion. They are a critical part of the turnout but do not constitute the entire "arrangement of point and crossing with lead rails" described.
• Level crossing: A level crossing is a point where a railway line intersects with a road or path at the same grade. Its function is to facilitate the passage of road or pedestrian traffic across the railway line, not to divert trains from one track to another.

Conclusion: The Correct Railway Part

Based on the analysis, the description provided accurately defines a Turn out. It is the complete arrangement that uses points (switches), crossings (frogs), and lead rails to allow trains to move from one track to another, thereby diverting the rolling stock.