Which of the following is not a wire that makes up the railway catenary?

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Multiple Choice

Which of the following is not a wire that makes up the railway catenary?

Explanation:
The overhead catenary is built from wires that support and supply power to the train, together with structural wires that keep the system in the correct position. The messenger wire runs along the span to provide the main support for the entire setup. The contact wire is the energized conductor that the pantograph touches to draw power. Hanger wires grip and suspend the contact wire from the messenger, maintaining the proper height and spacing. A guard rail, however, is a trackside component used for safety or guidance along the track and is not part of the overhead conductor system. So, the guard rail is not a wire that makes up the catenary.

The overhead catenary is built from wires that support and supply power to the train, together with structural wires that keep the system in the correct position. The messenger wire runs along the span to provide the main support for the entire setup. The contact wire is the energized conductor that the pantograph touches to draw power. Hanger wires grip and suspend the contact wire from the messenger, maintaining the proper height and spacing. A guard rail, however, is a trackside component used for safety or guidance along the track and is not part of the overhead conductor system. So, the guard rail is not a wire that makes up the catenary.

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