Question

A train operator should know that the automatic stop mechanisms used on the subway system are designed so that in case of signal power failure the stop arms will automatically move to the tripping position even though the locks ahead are clear. This is done because?

Answer 1

The automatic stop mechanisms used on subway systems are designed to ensure safety in the event of a signal power failure. They automatically move the stop arms to the tripping position, regardless of whether the locks ahead are clear. This prevents the train from continuing to move and helps prevent accidents.

Step-by-step explanation:

The automatic stop mechanisms used on subway systems are designed to ensure safety in the event of a signal power failure. When there is a power failure, the stop arms of the subway train will automatically move to the tripping position, even if the locks ahead are clear. This is done to prevent the train from continuing to move and potentially causing accidents or colliding with other trains.

This safety measure is necessary because in the absence of signal power, there may be no way for the train operator to manually stop the train. By automatically moving the stop arms to the tripping position, the train will come to a stop, preventing any further movement.