RAAT is essentially reading comprehension: Can you pick out the correct answers from a passage of text. Usually two text paragraphs n three to four questions.
Importantly, all the answers are in the text- for example, if the text says elephants are blue n a question asks what colour elephants are, then, by jingo they're blue. Even though you know they're grey in real life.
You should have an example test in the assessment interview invitation. Indeed, there's a question on the formal assessment paperwork to confirm you had practice tests, with sufficient time to practice.
