Bridge Engineering MCQ with answer and solution

Concept

Bridge Superstructure and Substructure Components

Formula

No formula

Step-by-step solution

Identify that a pier is part of the bridge's substructure (supporting structure below), whereas deck slabs and girders form the superstructure (structure above). Therefore, the answer is option A.

Explanation

A pier is part of the bridge's substructure, not the superstructure. The superstructure includes components located above the supports, like the deck slab, girders, and slabs that directly carry traffic. In contrast, a pier acts as an intermediate vertical support below the deck that transfers the weight of the bridge down to the foundation.

Shortcut

Remember: Superstructure is everything above the bearings/supports (Deck, Girder, Slab) where traffic moves, while Substructure includes the supports below that touch the ground or water (Pier, Abutment, Foundation). Mnemonic: Piers Push from below (Substructure).

Common mistake

Many students confuse substructure components (like piers and abutments that support the bridge from below) with superstructure components (like girders and deck slabs that carry traffic above).