I'm not so afraid of the qualifying exam anymore. First I wasn't, then I wasted a lot of study-time by studying the same thing for too long. Then I was worried I didn't have enough time left to get ready. But in the past few days I've managed to sufficiently study acoustics in not very much time. So maybe I can pull it off for other things (remote sensing, lasers, semiconductors, DSP) too, in the two weeks I have left.