By all means get grinds if you can, but with regard to Fluid Mechanics, all the questions asked will have come up on previous papers from 2003-present. Some of those older past papers aren't where you expect online though. I think the library website used to archive them, but from 2007 onwards MIS does. They are definitely up somewhere though if you look hard enough.
The Frank White Fluid Mechanics book and accompanying solutions manual cover most of those questions too and in great detail. Should be more than sufficient to get a pass if you genuinely work on it. (speaking as somebody who repeated 2nd year fluid mechanics myself). The repeat papers may possibly, (if you're really lucky) contain questions similar to the summer exam. So make sure you can answer all this years questions. Cause a single question you recognise is an easy 33%.
As for Theory of Machines, I can't remember the exam as vividly but I know there was stuff that you could learn off by heart for it, and that was helpful in getting me get over 40%.
Overall it's a tough group, repeating Strengths myself. Dedicate a solid 2 weeks to them though and you'll be fine. Best of Luck!
Last edited by Rob!; 30-07-2012 at 16:26.