Ruwan is not a very good reference for the PM, it does have a couple of sections that are helpful but overall pretty poor. You need a book that will give you an indepth view of project management, check the pinned References at the top of the forum, the sample questions from NCEES will give you a good Idea of what to expect, also, they provide the references from which the problems were developed. I got these and they were extremely helpful.
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