First of all, you want to check out their sample test paper available on the AKU website. Here is the link: http://www.aku.edu/SiteCollectionImages/C-Admissions/Registrar%E2%80%99s%20Office/MBBS%20Sample%20Test%20Paper.pdf
As you can see, the test comprises of 2 papers. One for English, the other for Sciences.
The first paper lasts 1 hour 15 minutes:
First 20 MCQs are like a SAT exam where you check if the sentence structure etc is correct
Next 10 MCQs ask relatively tough questions from a comprehension. In 2012, we had a