Which of the following are common types of rail switches?

The correct choice highlights the common types of rail switches used in rail operations. Manual switches are typically operated by hand, allowing yard personnel to direct trains onto different tracks. Electric switches utilize electrical power to move the switch points, providing a more efficient method of changing tracks, especially in busy rail yards. Remotely controlled switches allow for operation from a distance, enhancing safety and operational efficiency by reducing the need for personnel to be physically present at the switch.

These three types—manual, electric, and remotely controlled—are foundational to switching operations in rail systems. They enable precise control over train movements and facilitate the safe routing of trains through complex track configurations. The inclusion of all three provides a comprehensive view of the different ways that switches can be operated in rail environments.

Other options may include combinations that either mislabel or omit commonly used types of switches, which could lead to confusion in understanding the various mechanisms employed in rail switching practices.