SEVERN TUNNEL

The video discusses the construction of a two and a quarter mile tunnel under the 7 and the Y, forming a 65-mile power link between England and Wales. The tunnel, ten feet in diameter, will carry high-power electric cables as part of the super grid connections. Construction involves sinking shafts and using giant tunnelling machines guided by laser systems. The project is expected to take two years, with one year for tunnelling and another for cable laying. The video concludes with a mention of future challenges.

What is the length of the tunnel being constructed under the 7 and the Y?

• One mile

• Ten miles

• Five miles

• Two and a quarter miles

What is the primary purpose of the tunnel?

• To provide a pedestrian walkway

• To serve as a railway tunnel

• To carry high power electric cables

• To transport water

What is the diameter of the tunnel?

• Fifteen feet

• Ten feet

• Twenty feet

• Five feet

What technology is used to keep the tunneling machines in line?

• GPS tracking

• Laser beam guidance system

• Manual alignment

• Magnetic sensors

How long will it take to lay the cables after the tunnel is completed?

• Six months

• Two years

• Three months

• One year