The way this test works is: you are presented with a chinese word and four images and you will also hear the pronunciation of the word in chinese. Based on what you hear and what you see you need to select the correct image. Even if you don't know the word at the beginning, don't worry, you will get immediate feedback on whether your option is correct or not. If you get a low score then you should repeat the test again. You will see that the more you repeat the test the better your score will be.
Tips: If you want to see the roman alphabet pronunciation of a particular chinese word, click on the button that says 'pinyin'.