Question

After coasting for some distance, a train operator on a regular subway run moves the controller handle to multiple and finds that the train does not pick up speed. In order to find out if the third rail is dead, the train operator should ________.

Answer 1

To determine if the third rail is dead, the train operator should check the connection to the power source, inspect the train's electrical system, and communicate with others on the track.

Step-by-step explanation:

When a train operator moves the controller handle to multiple after coasting for some distance and the train does not pick up speed, it could be an indication that the third rail is dead. To confirm this, the train operator should perform a few steps:

1. Check if the third rail is properly connected to a power source. Sometimes, a loose connection or a power outage can cause the third rail to be inactive.
2. Inspect the train's electrical system, including the contact shoes that make contact with the third rail. If there is any damage or malfunction, it could prevent the train from receiving power.
3. Communicate with the control center or other trains on the same track to see if they are also experiencing a lack of power. This can help determine if the issue is specific to the train or affects the entire line.

By following these steps, the train operator can identify if the lack of speed is due to a dead third rail and take appropriate measures to address the issue.