Hmmm….I have taken proficiency tests recently, but it has been 35 years since I took a Biblical Prophecy test back when I was an undergrad in a faith based university. It was not online back then. I did take some on line tests in grad school, and it was a little nerve racking to take a timed on line test. Perhaps other students in your class who have taken on line tests before can give you some advice. You also might talk to the professor about what to expect, many times she or he will give a study guide that will help.
If it is possible, scan the whole test once you start to see the types of questions. Then go back with some idea of how much time to spend on each section.
Best of luck!