I don't know about MFS but the online testing had a couple of short stories you had to read like Mike works for a clothing store and has sold 20 red shirts, 15 blue shirts, 10 yellow shirts and 5 greens shirts and the question would be something like out of the information above which would show greatest potential for future growth. This isn't a real question but was the best example I could think of off the top of my head, I thought they were a bit silly as they had nothing really fire related.
The personality profiling questions were good especially if you had previous CFS or SES experience as they asked questions like if you had a new crew member in your team and you were responding to a first aid emergency and they were feeling under confident in their skills yet they operated well under the situation how would you boost their confidence:
A) raise it in the truck on the way back to the station and congratulate them on how well they did?
B) Quietly say something when back at station to the individual on how well they did, Or
C) Mention it to your senior ranking officer they were feeling under confident on their skill however they operated to standard.