The Forth Bridge is an example of which bridge type?

• A. Arch Bridge
• B. Suspension Bridge
• C. Truss Bridge
• D. Cantilever Bridge

Answer: (D)

The main idea here is recognizing how the structure carries loads and spans between supports. A cantilever bridge uses projecting arms fixed at piers that extend toward the center, with the central span often supported by those arms rather than hung from a cable or forming a curved arch.

The Forth Bridge fits this pattern because it uses large cantilever arms that extend from each pier, and the central span is supported by (and suspended from) the ends of those cantilevers. This cantilever action is the defining feature, setting it apart from an arch bridge (which relies on a curved arch shape to transfer load to abutments), a suspension bridge (which uses main cables and hangers to support the deck), or a straightforward truss bridge (which would be a simple truss span without the distinctive cantilever arms and suspended center).