Yes Indeed! Do not stress yourself out about it! The more tense you are about it, the more chance you have to make silly mistakes. Look over the video again, and read over the questions you have answered in the book. When you are there, think about the question that is being asked and then look at the answers you have to chose from. There are a few questions on the body and things like decompression sickness, narcosis, first aid etc. so pay attention to the chapters talking about them. Also, make sure you know how to do the tables. If you have any questions on anything be sure to ask before the test is given out.
It is not as bad as you are making it out to be. If you have to look at it as a review of what you have learned thus far... and not a "test" per say. :>