you will need to know things like slabs are floors. that they are usally placed on a crushed aggregate, but they can be poured straight on the dirt in a pinch. also you can put rebar in them or maybe wwf. be sure that you know that slabs are made of concete....that is highly likely to be a test question.
I wish I could tell you more, but you can always try calling NCEES and asking them, because they write the exam and would know better than anyone.