Which statement best defines a catenary in an LRV system?

Which statement best defines a catenary in an LRV system?

• A. A system of overhead wires in which the contact wire is supported from one or more longitudinal messengers either directly by hangers or by hangers in combination with auxiliary conductors or clamps.
• B. Crossing Gates
• C. Coupler
• D. Deadman

Answer: (A)

In electric light-rail systems, the catenary is the overhead power supply arrangement. It describes how the contact wire that the vehicle’s pantograph or trolley pole touches is carried and supported by one or more messenger wires running along the line, with hangers or clamps to hold everything in place. This setup allows the contact wire to maintain the right height and tension, accommodating sag from temperature changes and movement as trains pass. The given statement matches this idea by describing a system of overhead wires where the contact wire is supported from longitudinal messengers, either directly by hangers or by hangers with auxiliary conductors or clamps. The other terms—Crossing Gates, Coupler, and Deadman—refer to different railway components (safety devices at grade crossings, vehicle connections, and safety activation devices, respectively) and do not define the catenary.

In electric light-rail systems, the catenary is the overhead power supply arrangement. It describes how the contact wire that the vehicle’s pantograph or trolley pole touches is carried and supported by one or more messenger wires running along the line, with hangers or clamps to hold everything in place. This setup allows the contact wire to maintain the right height and tension, accommodating sag from temperature changes and movement as trains pass.

The given statement matches this idea by describing a system of overhead wires where the contact wire is supported from longitudinal messengers, either directly by hangers or by hangers with auxiliary conductors or clamps. The other terms—Crossing Gates, Coupler, and Deadman—refer to different railway components (safety devices at grade crossings, vehicle connections, and safety activation devices, respectively) and do not define the catenary.