The Millimetre Zone was a general engineering zone funded by the Royal Academy of Engineering, with six engineers working in a variety of areas:
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- Vix designs water and sewage treatment centres
- Rhys is responsible for safety and technical management of the NATO submarine rescue system
- Josh designs and makes instruments used by scientists for precision measurements
- Demi, the winner in this zone, helps her company to win more work in the rail sector
- Clare looks after the blades of wind turbines
- Andrew is a project manager for Yorkshire Water
Nearly two thirds of questions in this zone were about careers and education with students showing a real interest in the different career paths the engineers had taken, such as why Demi had chosen to give up being an athlete to become an engineer
