What do engineers use to build tunnels deep under the surface?
They use TBM - Tunnel Boring Machine
What joins England and France?
It's the Chunnel - a railway tunnel under the English Channel.
Where do tunnels go?
They go under mountains and under water.
What machine is it?
It's a concrete-miver.
What is the simplest type of bridge?
It's a beam bridge.
Why do people build tunnels and bridges?
Because they make our journeys quicker.
What's his job?
He's an engineer.
What type of bridge is it?
It's a beam bridge.
What machine is it?
It's a crane.
What type of bridge is it?
It's an arch bridge.
What is a suspension bridge supported by?
It's supported by strong cables and tall towers.
What machine is it?
It's a tunnel boring machine.
Where are they standing?
They're standing in a trench.
What machine is it?
It's a bulldozer.
What machine is it?
It's a digger.
What is the hen walking on?
It's walking on concrete.
What methods do people use to build tunnels noit deep from the surface?
They use cut and cover methods.
Why do people build arch bridges?
Because an arch is a very strong shape.
What type of bridge is it?
It's a suspension bridge.
What's this?
It's a moving belt.
What is the longest road tunnel in the world?
It's the tunnel in Norway, it's 24.5 km long.
What machine is it?
It's a truck/lorry.
What are these?
They're thick rods.
What is a long beam bridge supported by?
It's supported by piers at each end.
What have they broken?
They've broken a tube.
What's this?
It's a tunnel.