Bridges quiz

More questions about Bridges

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Medium

   What process around bridge piers is the leading cause of bridge collapse?

   Answer: Scour

   Why: River currents create vortex eddies around pier bases that dig away supporting sediment until the foundation fails.

2. 2 Easy

   What condition plagued workers building deep bridge foundations?

   Answer: The bends

   Why: Working inside pressurized caissons forced nitrogen into workers' blood, creating painful gas bubbles if they decompressed too fast.

3. 3 Medium

   How are suspension bridge main cables usually built on site?

   Answer: Aerial spinning

   Why: A traveling wheel lays the wire loop by loop, and each Golden Gate main cable ended up holding 27,572 of them.

4. 4 Easy

   Why are marching troops traditionally ordered to break step when crossing a suspension bridge?

   Answer: To prevent mechanical resonance

   Why: Broughton bridge near Manchester fell in 1831 under 74 men of the 60th Rifle Corps marching in step; twenty were hurt, none killed.

5. 5 Easy

   What living plant parts form ancient bridges in Meghalaya, India?

   Answer: Tree roots

   Why: Unlike timber bridges that rot in humid monsoons, living root bridges grow stronger as the intertwined roots mature.

6. 6 Easy

   What supports the roadway of a pontoon bridge?

   Answer: Floating boats

   Why: Because pontoons float freely on the water surface, they allow quick temporary crossings without deep riverbed piers.