I stumbled upon this post when I started studying for the Seismic/Surveying exams so I thought I'd post regarding my experience to give back.
I'm a structural engineer in Arizona who already passed the PE a year ago and just took the Seismic Exam earlier this month, and am taking the Surveying next week.
Per Civil Dawg's recommendation I bought Hiner's Seismic book. I didn't bother reading it, and just did all the 20 or so long questions and all ~430 of the shorter questions. Not sure how long I studied in total, but I felt very prepared going into the exam having done so many practice problems. As others have noted, time really is the biggest issue and you have basically no time to try and look anything up. One question asked .............<deleted>............. and I definitely spent wayyyy too long finding it in the ACI because I was too stubborn to skip it.
Anyways, I still think I did well and would definitely recommend Hiner's book and cranking out all the problems if you have time, I can't imagine a better way to study.
I'd also like to add, as others have said, I think it's ridiculous how much of a time crunch these tests are. Doesn't reflect the real world at all and only tests you on your test taking ability. Sure, the percent you need to get correct is low, but why not allow another hour and half and increase the number of questions required to pass. I really think that would better reflect ones knowledge over just their test taking abilities. Why does the PE exam offer 4 hours for 40 questions while seismic/surveying is 2.5 hours for 55? Doesn't seem right, and part of me thinks it's just a money grab by the California board.
Anyways, good luck to anyone else taking it this April or in the future, I'll update my post after I finish up with the Surveying exam.