First Class Naval Arch (1NAR) is the largest question bank on 1st Class (Applied Mechanics has it in 2nd). The syllabus is spelled out in TP2293, Examination and Certification of Seafarers and consists roughly 60/40 stability/ship construction.

http://www.tc.gc.ca/eng/marinesafety/tp ... 1774.htm#7Stability questions tend to be of the mathematical type, and construction to be essay type questions. You are more or less garunteed at least one (or more) Simpson's Rule question and possibly a Second Moment question. If you can do all the First Class questions in Reeds, you will have a good chance of a pass. Of course, if you do all the maths questions and leave out the construction ones, get prepared for Orals!