If you have been set a knowledge test, this will appear in your 'My Work' list:
Clicking on your knowledge test will take you to this test, you can then select 'Start':
In the knowledge test window you will be able to see how many questions are in the test, and how many marks a question is worth, you can easily move between questions. (You can exit the test at any time and your answers will be saved.)
Once you have answered all the questions you can click 'Complete':
Your test results will then appear, showing your final score, and breaking down marks per question. You have the option to review any answers submitted:
When reviewing answers you can chose to see the correct answer:
You will also be able to see any knowledge test results in your reports.