When I was a nuke, they rarely gave us multiple guess questions, but when they did, passing was not tough. First off, if you know the answer, answer the question (of course). If you can, eliminate some obvious wrong answers. A reportable fuel spill is enough fuel to cause a sheen, no you can't use Dawn on it, and you report to the NRC, not to the nearest sector or station. Anyway, if you have say 2 reasonable choices, or you just have no idea, use the clock method. If you have no clue, look at the clock or your wristwatch. If the second hand is in the first quadrant, the answer is a. If in the second quadrant, b and so on.
I made it through nuke school on the clock method.
Now, when I took my captain's test, I downloaded from the internet the entire deck general, deck safety, basically all of the 100 ton and unlimited DDE test bank and I didn't study the test, I studied the test bank. I actually learned every answer to every question including the wrong answers. Yes, there are known wrong answers. If the test key has a wrong answer, it's in the downloaded questions. I answered the questions as I had seen them in the test bank, and I aced the 100 ton, and aced DDE except for steam plants, because I was actually a steam plant engineer, so I didn't study for the test for steam plants. Turns out that they wanted to know mostly about superheated boilers, and as I said, I was a nuke. We didn't have superheat. Or boilers. They didn't ask any reactor theory questions on the steam exam. I still don't have a steam endorsement.