As you know, one of the conditions for passing the diving course is passing a theoretical knowledge test. In preparation for this test, a short knowledge review exam will appear at the end of each chapter.
In some chapters, this exam is a mandatory exam that is a condition for moving on to the next chapter. In other cases it will be possible to skip the exam. In other cases, in order to take the exam you will have to go through all the topics (all the topics will be marked in green).

After you have chosen an answer and confirmed your choice, the answer will be checked. If you did not choose the correct answer, the system will present it to you, and sometimes an explanation of the correct answer will also appear.

A passing grade for each knowledge review exam is 80.
In chapters where the exam is mandatory and you did not pass the exam, you will be asked to take a retest. In cases where the knowledge exam is not mandatory, you can choose to repeat the exam or skipping to the next chapter.
Whenever you want to improve your grade, you can choose to do the exam again.