If it's anything like a test for "Operators" in a chemical / refinery here in TX, it's mostly a mental deal to see if you have the proper temperment to spend long hours watching gauges and such. It's all psychological so there's no realy right or wrong answers, at least on the test I was given.
I took one years ago for BASF Corp. and the results said I needed challenging things to do and basically would go nuts sitting around in such a regimented environment.