Technical understanding, mechanical comprehension tests

[mike172]

I'm attending an assessment day on Tuesday in Lincoln with BAE Systems for the role of trainee aircraft mechanic.
The tests include a technical understanding test as well as a mechanical comprehension and others.
I've found a couple of practice mech comprehension tests but I can't find any technical understanding test online.
There is also a fault diagnosis test, if anyone knows of any practice questions for this as well online or knows what form the questions take.

Any of you guys know of any tests online that I could have a look at?

It would be a great help to me.

Thanks