Yes, SIMTICS allows you to take the quiz more than once.
Note that the quiz will look different each time since there is a larger bank of questions than the number that is presented, and the order of the questions is shuffled as well.
Each time you click on the button to start a quiz, SIMTICS essentially creates a new quiz for you. This is to make sure that you are using your knowledge recall from what you've learned in the module. This is how the SIMTICS quizzes work:
The system selects questions at random from the question bank for that module. Usually 25 questions are presented per quiz out of a total of about 50, but the number may vary in some modules. Therefore, just because a certain question came up when you did the quiz before, bear in mind that you might not get that same question again the next time.
The order of the questions is shuffled - so, for example, if a question appeared in the first position (or whatever) when you did the quiz before, it won't be the first question the next time, or it may not be presented at all.
The order of the possible answers for each question is also shuffled - so if you recognize a question from before and the correct answer was the third one in the list, you cannot assume the correct answer will be in the same position next time; they will have been shuffled.