Time management is key to passing the exam . Do you have all your reference books ready? Are they tabbed and highlighted? Being familiar with your reference books is a huge benefit. You only have a couple minutes to answer answers you have to be able to find information very quickly.
I typically followed a multi-step process in taking exams. First I answered only the questions that I knew the answers to . Secondly I answered questions where I knew where to look in my reference books. Next I addressed questions that involve calculations. I then searched for answers to questions I had no idea for. Finally I went through the questions to make sure every question had an answer.
Having a strategy like this allowed me to pass several ASQ certification exams.